JLSEC-2026-285

A flaw was found in libXpm. When processing files with .Z or .gz extensions, the library calls external programs to compress and uncompress files, relying on the PATH environment variable to find these programs, which could allow a malicious user to execute other programs by manipulating the PATH...

JLSEC-2026-284

A flaw was found in libXpm. This issue occurs when parsing a file with a comment not closed; the end-of-file condition will not be detected, leading to an infinite loop and resulting in a Denial of Service in the application linked to the library...

JLSEC-2026-288 Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal...

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal frmts/zlib/contrib/infback9 modules. This vulnerability is associated with program files inftree9.C‎. This issue affects gdal: before 3.11.0...

JLSEC-2026-283

A flaw was found in libXpm. When processing a file with width of 0 and a very large height, some parser functions will be called repeatedly and can lead to an infinite loop, resulting in a Denial of Service in the application linked to the library...

JLSEC-2026-281 RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution

Summary The RC endpoint operations/fsinfo is exposed without AuthRequired: true and accepts attacker-controlled fs input. Because rc.GetFs... supports inline backend definitions, an unauthenticated attacker can instantiate an attacker-controlled backend on demand. For the WebDAV backend,...

JLSEC-2026-279 Rclone has Improper Permission and Ownership Handling on Symlink Targets with --links and --metadata

tl;dr: unprivileged user creates a symlink to /etc/sudoers, /etc/shadow or similar and waits for a privileged user or process to copy/backup/mirror users data using --links and --metadata. unprivileged user now owns /etc/sudoers. Summary Insecure handling of symlinks with --links and --metadata i...

JLSEC-2026-278

An issue was discovered in Rclone before 1.53.3. Due to the use of a weak random number generator, the password generator has been producing weak passwords with much less entropy than advertised. The suggested passwords depend deterministically on the time the second rclone was started. This limi...

JLSEC-2026-280 Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution

Summary The RC endpoint options/set is exposed without AuthRequired: true, but it can mutate global runtime configuration, including the RC option block itself. An unauthenticated attacker can set rc.NoAuth=true, which disables the authorization gate for many RC methods registered with...

JLSEC-2026-274 Issue summary: During processing of a crafted CMS EnvelopedData message with KeyAgreeRecipientInfo a...

Issue summary: During processing of a crafted CMS EnvelopedData message with KeyAgreeRecipientInfo a NULL pointer dereference can happen. Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denial of...

JLSEC-2026-232 openssl-src contains Double free after calling `PEM_read_bio_ex`

The function PEMreadbioex reads a PEM file from a BIO and parses and decodes the "name" e.g. "CERTIFICATE", any header data and the payload data. If the function succeeds then the "nameout", "header" and "data" arguments are populated with pointers to buffers containing the relevant decoded data...

JLSEC-2026-220 The X.509 GeneralName type is a generic type for representing different types of names

The X.509 GeneralName type is a generic type for representing different types of names. One of those name types is known as EDIPartyName. OpenSSL provides a function GENERALNAMEcmp which compares different instances of a GENERALNAME to see if they are equal or not. This function behaves incorrect...

JLSEC-2026-226 There is a carry propagation bug in the MIPS32 and MIPS64 squaring procedure

There is a carry propagation bug in the MIPS32 and MIPS64 squaring procedure. Many EC algorithms are affected, including some of the TLS 1.3 default curves. Impact was not analyzed in detail, because the pre-requisites for attack are considered unlikely and include reusing private keys. Analysis...

JLSEC-2026-215 OpenSSL 1.1.1 introduced a rewritten random number generator (RNG)

OpenSSL 1.1.1 introduced a rewritten random number generator RNG. This was intended to include protection in the event of a fork system call in order to ensure that the parent and child processes did not share the same RNG state. However this protection was not being used in the default case. A...

JLSEC-2026-229 In addition to the `c_rehash` shell command injection identified in CVE-2022-1292, further...

In addition to the crehash shell command injection identified in CVE-2022-1292, further circumstances where the crehash script does not properly sanitise shell metacharacters to prevent command injection were found by code review. When the CVE-2022-1292 was fixed it was not discovered that there...

JLSEC-2026-233 openssl-src vulnerable to Use-after-free following `BIO_new_NDEF`

The public API function BIOnewNDEF is a helper function used for streaming ASN.1 data via a BIO. It is primarily used internally to OpenSSL to support the SMIME, CMS and PKCS7 streaming capabilities, but may also be called directly by end user applications. The function receives a BIO from the...

JLSEC-2026-250 Issue summary: Checking excessively long DSA keys or parameters may be very slow.

Issue summary: Checking excessively long DSA keys or parameters may be very slow. Impact summary: Applications that use the functions EVPPKEYparamcheck or EVPPKEYpubliccheck to check a DSA public key or DSA parameters may experience long delays. Where the key or parameters that are being checked...

JLSEC-2026-255 Issue summary: PBMAC1 parameters in PKCS#12 files are missing validation which can trigger a...

Issue summary: PBMAC1 parameters in PKCS12 files are missing validation which can trigger a stack-based buffer overflow, invalid pointer or NULL pointer dereference during MAC verification. Impact summary: The stack buffer overflow or NULL pointer dereference may cause a crash leading to Denial o...

JLSEC-2026-245 Issue summary: The POLY1305 MAC (message authentication code) implementation contains a bug that...

Issue summary: The POLY1305 MAC message authentication code implementation contains a bug that might corrupt the internal state of applications running on PowerPC CPU based platforms if the CPU provides vector instructions. Impact summary: If an attacker can influence whether the POLY1305 MAC...

JLSEC-2026-273

Issue summary: When a delta CRL that contains a Delta CRL Indicator extension is processed a NULL pointer dereference might happen if the required CRL Number extension is missing. Impact summary: A NULL pointer dereference can trigger a crash which leads to a Denial of Service for an application...

JLSEC-2026-241 Issue summary: Checking excessively long DH keys or parameters may be very slow.

Issue summary: Checking excessively long DH keys or parameters may be very slow. Impact summary: Applications that use the functions DHcheck, DHcheckex or EVPPKEYparamcheck to check a DH key or DH parameters may experience long delays. Where the key or parameters that are being checked have been...

JLSEC-2026-240 Issue summary: The AES-SIV cipher implementation contains a bug that causes it to ignore empty...

Issue summary: The AES-SIV cipher implementation contains a bug that causes it to ignore empty associated data entries which are unauthenticated as a consequence. Impact summary: Applications that use the AES-SIV algorithm and want to authenticate empty data entries as associated data can be misl...

JLSEC-2026-246 Issue summary: Checking excessively long invalid RSA public keys may take a long time.

Issue summary: Checking excessively long invalid RSA public keys may take a long time. Impact summary: Applications that use the function EVPPKEYpubliccheck to check RSA public keys may experience long delays. Where the key that is being checked has been obtained from an untrusted source this may...

JLSEC-2026-247 Null pointer dereference in PKCS12 parsing

Issue summary: Processing a maliciously formatted PKCS12 file may lead OpenSSL to crash leading to a potential Denial of Service attack Impact summary: Applications loading files in the PKCS12 format from untrusted sources might terminate abruptly. A file in PKCS12 format can contain certificates...

JLSEC-2026-265 Issue summary: Processing a malformed PKCS#12 file can trigger a NULL pointer dereference in the...

Issue summary: Processing a malformed PKCS12 file can trigger a NULL pointer dereference in the PKCS12itemdecryptd2iex function. Impact summary: A NULL pointer dereference can trigger a crash which leads to Denial of Service for an application processing PKCS12 files. The PKCS12itemdecryptd2iex...

JLSEC-2026-235 A security vulnerability has been identified in all supported versions

A security vulnerability has been identified in all supported versions of OpenSSL related to the verification of X.509 certificate chains that include policy constraints. Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of...

JLSEC-2026-275

Issue summary: During processing of a crafted CMS EnvelopedData message with KeyTransportRecipientInfo a NULL pointer dereference can happen. Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denia...

JLSEC-2026-217 OpenSSL has internal defaults for a directory tree where it can find a configuration file as well as...

OpenSSL has internal defaults for a directory tree where it can find a configuration file as well as certificates used for verification in TLS. This directory is most commonly referred to as OPENSSLDIR, and is configurable with the --prefix / --openssldir configuration options. For OpenSSL versio...

JLSEC-2026-230 AES OCB fails to encrypt some bytes

AES OCB mode for 32-bit x86 platforms using the AES-NI assembly optimised implementation will not encrypt the entirety of the data under some circumstances. This could reveal sixteen bytes of data that was preexisting in the memory that wasn't written. In the special case of "in place" encryption...

JLSEC-2026-239 Issue summary: Processing some specially crafted ASN.1 object identifiers or data containing them...

Issue summary: Processing some specially crafted ASN.1 object identifiers or data containing them may be very slow. Impact summary: Applications that use OBJobj2txt directly, or use any of the OpenSSL subsystems OCSP, PKCS7/SMIME, CMS, CMP/CRMF or TS with no message size limit may experience...

JLSEC-2026-253 Issue summary: Applications performing certificate name checks (e.g., TLS clients checking server...

Issue summary: Applications performing certificate name checks e.g., TLS clients checking server certificates may attempt to read an invalid memory address resulting in abnormal termination of the application process. Impact summary: Abnormal termination of an application can a cause a denial of...

JLSEC-2026-258 Issue summary: The 'openssl dgst' command-line tool silently truncates input data to 16MB when using...

Issue summary: The 'openssl dgst' command-line tool silently truncates input data to 16MB when using one-shot signing algorithms and reports success instead of an error. Impact summary: A user signing or verifying files larger than 16MB with one-shot algorithms such as Ed25519, Ed448, or ML-DSA m...

JLSEC-2026-267 Issue summary: A timing side-channel which could potentially allow remote recovery of the private...

Issue summary: A timing side-channel which could potentially allow remote recovery of the private key exists in the SM2 algorithm implementation on 64 bit ARM platforms. Impact summary: A timing side-channel in SM2 signature computations on 64 bit ARM platforms could allow recovering the private...

JLSEC-2026-223 openssl-src NULL pointer Dereference in `signature_algorithms` processing

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signaturealgorithms extension where it was present in the initial ClientHello, but includes a signaturealgorithmscert extension then a NU...

JLSEC-2026-234 Vulnerable OpenSSL included in cryptography wheels

There is a type confusion vulnerability relating to X.400 address processing inside an X.509 GeneralName. X.400 addresses were parsed as an ASN1STRING but the public structure definition for GENERALNAME incorrectly specified the type of the x400Address field as ASN1TYPE. This field is subsequentl...

JLSEC-2026-266

Issue summary: An application trying to decrypt CMS messages encrypted using password based encryption can trigger an out-of-bounds read and write. Impact summary: This out-of-bounds read may trigger a crash which leads to Denial of Service for an application. The out-of-bounds write can cause a...

JLSEC-2026-249 Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when...

Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions Impact summary: An attacker may exploit certain server configurations to trigger unbounded memory growth that would lead to a Denial of Service This problem can occur in...

JLSEC-2026-277 Issue summary: Applications using RSASVE key encapsulation to establish a secret encryption key can...

Issue summary: Applications using RSASVE key encapsulation to establish a secret encryption key can send contents of an uninitialized memory buffer to a malicious peer. Impact summary: The uninitialized buffer might contain sensitive data from the previous execution of the application process whi...

JLSEC-2026-252 Issue summary: Calling the OpenSSL API function `SSL_select_next_proto` with an empty supported...

Issue summary: Calling the OpenSSL API function SSLselectnextproto with an empty supported client protocols buffer may cause a crash or memory contents to be sent to the peer. Impact summary: A buffer overread can have a range of potential consequences such as unexpected application beahviour or ...

JLSEC-2026-216 There is an overflow bug in the `x64_64` Montgomery squaring procedure used in exponentiation with...

There is an overflow bug in the x6464 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are...

JLSEC-2026-244 Issue summary: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys...

Issue summary: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow. Impact summary: Applications that use the functions DHgeneratekey to generate an X9.42 DH key may experience long delays. Likewise, applications that use...

JLSEC-2026-276 Issue summary: Converting an excessively large OCTET STRING value to a hexadecimal string leads to a...

Issue summary: Converting an excessively large OCTET STRING value to a hexadecimal string leads to a heap buffer overflow on 32 bit platforms. Impact summary: A heap buffer overflow may lead to a crash or possibly an attacker controlled code execution or other undefined behavior. If an attacker c...

JLSEC-2026-243 Issue summary: A bug has been identified in the processing of key and initialisation vector (IV)...

Issue summary: A bug has been identified in the processing of key and initialisation vector IV lengths. This can lead to potential truncation or overruns during the initialisation of some symmetric ciphers. Impact summary: A truncation in the IV can result in non-uniqueness, which could result in...

JLSEC-2026-272

Issue summary: An uncommon configuration of clients performing DANE TLSA-based server authentication, when paired with uncommon server DANE TLSA records, may result in a use-after-free and/or double-free on the client side. Impact summary: A use after free can have a range of potential consequenc...

JLSEC-2026-270 Issue summary: A type confusion vulnerability exists in the signature verification of signed PKCS#7...

Issue summary: A type confusion vulnerability exists in the signature verification of signed PKCS7 data where an ASN1TYPE union member is accessed without first validating the type, causing an invalid or NULL pointer dereference when processing malformed PKCS7 data. Impact summary: An application...

JLSEC-2026-242 Issue summary: The POLY1305 MAC (message authentication code) implementation contains a bug that...

Issue summary: The POLY1305 MAC message authentication code implementation contains a bug that might corrupt the internal state of applications on the Windows 64 platform when running on newer X8664 processors supporting the AVX512-IFMA instructions. Impact summary: If in an application that uses...

JLSEC-2026-269 Issue summary: An invalid or NULL pointer dereference can happen in an application processing a...

Issue summary: An invalid or NULL pointer dereference can happen in an application processing a malformed PKCS12 file. Impact summary: An application processing a malformed PKCS12 file can be caused to dereference an invalid or NULL pointer on memory read, resulting in a Denial of Service. A type...

JLSEC-2026-259 Issue summary: Use of -addreject option with the openssl x509 application adds a trusted use instead...

Issue summary: Use of -addreject option with the openssl x509 application adds a trusted use instead of a rejected use for a certificate. Impact summary: If a user intends to make a trusted certificate rejected for a particular use it will be instead marked as trusted for that use. A copy & paste...

JLSEC-2026-231 openssl-src subject to Timing Oracle in RSA Decryption

A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages fo...

JLSEC-2026-251 Issue summary: Calling the OpenSSL API function `SSL_free_buffers` may cause memory to be accessed...

Issue summary: Calling the OpenSSL API function SSLfreebuffers may cause memory to be accessed that was previously freed in some situations Impact summary: A use after free can have a range of potential consequences such as the corruption of valid data, crashes or execution of arbitrary code...

JLSEC-2026-248 Issue summary: A timing side-channel which could potentially allow recovering the private key exists...

Issue summary: A timing side-channel which could potentially allow recovering the private key exists in the ECDSA signature computation. Impact summary: A timing side-channel in ECDSA signature computations could allow recovering the private key by an attacker. However, measuring the timing would...