JLSEC-2026-1283

In Ruby through 3.0 on Windows, a remote attacker can submit a crafted path when a Web application handles a parameter with TmpDir...

JLSEC-2026-1285

An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between th...

JLSEC-2026-1282

The REXML gem before 3.2.5 in Ruby before 2.6.7, 2.7.x before 2.7.3, and 3.x before 3.0.1 does not properly address XML round-trip issues. An incorrect document can be produced after parsing and serializing...

JLSEC-2026-1290

There is a buffer over-read in Ruby before 2.6.10, 2.7.x before 2.7.6, 3.x before 3.0.4, and 3.1.x before 3.1.2. It occurs in String-to-Float conversion, including KernelFloat and Stringtof...

JLSEC-2026-1288

CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby...

JLSEC-2026-1286

The cgi gem before 0.1.0.2, 0.2.x before 0.2.2, and 0.3.x before 0.3.5 for Ruby allows HTTP response splitting. This is relevant to applications that use untrusted user input either to generate an HTTP response or to create a CGI::Cookie object...

JLSEC-2026-1281

An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy which also has a po...

JLSEC-2026-1277

GNOME libsoup before 3.6.0 allows HTTP request smuggling in some configurations because '\0' characters at the end of header names are ignored, i.e., a "Transfer-Encoding\0: chunked" header is treated the same as a "Transfer-Encoding: chunked" header...

JLSEC-2026-1279

GNOME libsoup before 3.6.1 has an infinite loop, and memory consumption. during the reading of certain patterns of WebSocket data from clients...

JLSEC-2026-1280

A flaw was found in libsoup. The package is vulnerable to a heap buffer over-read when sniffing content via the skipinsightwhitespace function. Libsoup clients may read one byte out-of-bounds in response to a crafted HTTP response by an HTTP server...

JLSEC-2026-1276

Graphviz 2.36.0 through 9.x before 10.0.1 has an out-of-bounds read via a crafted config6a file. NOTE: exploitability may be uncommon because this file is typically owned by root...

JLSEC-2026-1278 GNOME libsoup before 3.6.1 allows a buffer overflow in applications that perform conversion to...

GNOME libsoup before 3.6.1 allows a buffer overflow in applications that perform conversion to UTF-8 in soupheaderparseparamliststrict. There is a plausible way to reach this remotely via soupmessageheadersgetcontenttype e.g., an application may want to retrieve the content type of a request or...

JLSEC-2026-1273

ModularSquareRoot in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service infinite loop via crafted DER public-key data associated with squared odd numbers, such as the square of 268995137513890432434389773128616504853...

JLSEC-2026-1271

Crypto++ aka cryptopp through 8.9.0 has a Marvin side channel during decryption with PKCS1 v1.5 padding...

JLSEC-2026-1272

gf2n.cpp in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service application crash via DER public-key data for an F2^m curve, if the degree of each term in the polynomial is not strictly decreasing...

JLSEC-2026-1274 code-server's session cookie can be extracted by having user visit specially crafted proxy URL

Summary A maliciously crafted URL using the proxy subpath can result in the attacker gaining access to the session token. Details Failure to properly validate the port for a proxy request can result in proxying to an arbitrary domain. The malicious URL https:///proxy/[email protected]/path would be...

JLSEC-2026-1275 libgit2 versions v0.27.0 through v1.9.0 built with the libssh2 SSH backend (USE_SSH=libssh2)...

libgit2 versions v0.27.0 through v1.9.0 built with the libssh2 SSH backend USESSH=libssh2 contain a shell command injection vulnerability that allows remote attackers to execute arbitrary commands on an SSH server by supplying a repository path containing unescaped shell metacharacters such as...

JLSEC-2026-1270

Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, when using Transfer-Encoding: chunked, if a chunk's size parsed to a value of 2^64 or larger, it would be truncated to a 64-bit integer. In theory, this bug could enable HTTP request/response smuggling. This...

JLSEC-2026-1269

Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, a negative Content-Length value was converted to unsigned, treating it as an impossibly large length instead. In theory, this bug could enable HTTP request/response smuggling. This vulnerability is fixed in...

JLSEC-2026-1268 Cap'n Proto and its Rust implementation vulnerable to out-of-bounds read due to logic error handling list-of-list

The Cap'n Proto library and capnp Rust package are vulnerable to out-of-bounds read due to logic error handling list-of-list. If a message consumer expects data of type "list of pointers", and if the consumer performs certain specific actions on such data, then a message producer can cause the...

JLSEC-2026-1267 A vulnerability was identified in uclouvain openjpeg up to 2.5.4. This impacts the function...

A vulnerability was identified in uclouvain openjpeg up to 2.5.4. This impacts the function opjpiinitialiseencode in the library src/lib/openjp2/pi.c. The manipulation leads to integer overflow. The attack must be carried out locally. The exploit is publicly available and might be used. The...

JLSEC-2026-1266

A null pointer dereference issue was discovered in functions opgetdata and opopen1 in opusfile.c in xiph opusfile 0.9 thru 0.12 allows attackers to cause denial of service or other unspecified impacts...

JLSEC-2026-1264 GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file...

GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file handling. When the mktemp utility is not available in the user’s PATH, gzexe falls back to constructing a temporary file path based solely on the process ID PID. This predictable filename is created without...

JLSEC-2026-1265 GNU gzip contains a global buffer overflow vulnerability in the LZH decompression logic caused by...

GNU gzip contains a global buffer overflow vulnerability in the LZH decompression logic caused by improper reuse of shared global state between different decompression formats within a single execution. GNU gzip maintains a global array that is shared across the LZ77, LZW, and LZH decompression...

JLSEC-2026-1263

A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a dynamically allocated array. When subsequent partition additions cause the array to be...

JLSEC-2026-1262 In wxWidgets before 3.2.7, a crash can be triggered in wxWidgets apps when connections are...

In wxWidgets before 3.2.7, a crash can be triggered in wxWidgets apps when connections are refused in wxWebRequestCURL...

JLSEC-2026-1261 GNU patch is vulnerable to a denial of service (DoS) due to improper validation of hunk (single...

GNU patch is vulnerable to a denial of service DoS due to improper validation of hunk single block of changes in diff line offsets in unified-diff input. A specially crafted patch can specify an extremely large line number, causing the application to enter an effectively infinite processing loop...

JLSEC-2026-1260 GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified...

GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified-diff patch file. Improper handling of consecutive end-of-file newline markers can corrupt internal hunk single block of changes in diff data structures, causing the application to pass a NULL pointer...

JLSEC-2026-1259 In MIT Kerberos 5 (aka krb5) before 1.22.3, there is an integer underflow and resultant out-of...

In MIT Kerberos 5 aka krb5 before 1.22.3, there is an integer underflow and resultant out-of-bounds read if an application calls gssacceptseccontext on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process t...

JLSEC-2026-1258 In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference if an application...

In MIT Kerberos 5 aka krb5 before 1.22.3, there is a NULL pointer dereference if an application calls gssacceptseccontext on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, causing the process to terminate in parsenegomessage...

JLSEC-2026-1257 Cesanta Mongoose before 7.22 contains an out-of-bounds read in the built-in TLS server function...

Cesanta Mongoose before 7.22 contains an out-of-bounds read in the built-in TLS server function mgtlsserverrecvhello, which uses an attacker-controlled sessionidlen byte from a TLS ClientHello as a buffer index without validating it against the length of received data. A remote, unauthenticated...

JLSEC-2026-1252 Stack-based Buffer Overflow vulnerability in libmodbus v3.1.10 allows to overflow the buffer...

Stack-based Buffer Overflow vulnerability in libmodbus v3.1.10 allows to overflow the buffer allocated for the Modbus response if the function tries to reply to a Modbus request with an unexpected length...

JLSEC-2026-1251

libmodbus v3.1.10 has a heap-based buffer overflow vulnerability in readiostatus function in src/modbus.c...

JLSEC-2026-1253

libmodbus v3.1.10 is vulnerable to Buffer Overflow via the modbuswritebits function. This issue can be triggered when the function is fed with specially crafted input, which leads to out-of-bounds read and can potentially cause a crash or other unintended behaviors...

JLSEC-2026-1254

libmodbus v3.1.6 was discovered to contain a heap overflow via the modbusmappingfree function...

JLSEC-2026-1256

An invalid pointer in the modbusreceive function of libmodbus v3.1.6 allows attackers to cause a Denial of Service DoS via a crafted message sent to the unit-test-server...

JLSEC-2026-1250

A heap-based buffer overflow flaw was found in libmodbus in function modbusreply in src/modbus.c...

JLSEC-2026-1255

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx-backend pointer. This vulnerability allows attackers to cause a Denial of Service DoS via a crafted message sent to the unit-test-server...

JLSEC-2026-1243 A flaw was found in GLib. An off-by-one error can occur in the gvs_tuple_is_normal function in...

A flaw was found in GLib. An off-by-one error can occur in the gvstupleisnormal function in the glib/gvariant-serialiser.c file when doing an alignment padding check because the bounds check uses instead of =, causing an out-of-bounds read of only 1 byte. This issue can cause a minor information...

JLSEC-2026-1244 A flaw was found in GLib. An out-of-bounds read of only 2 bytes can occur in the...

A flaw was found in GLib. An out-of-bounds read of only 2 bytes can occur in the gdatetimegetymd function in the glib/gdatetime.c file when an invalid GDateTime object produced by the gdatetimeaddfull function is processed. This flaw can corrupt the date output and potentially cause logic errors...

JLSEC-2026-1245 A flaw was found in GLib. A buffer over-read can occur in the g_regex_replace function when used...

A flaw was found in GLib. A buffer over-read can occur in the gregexreplace function when used with the GREGEXRAW compile flag and case-change replacement escapes because the stringappend function processes matched substrings using UTF-8 functions that assume valid UTF-8 input, even when the stri...

JLSEC-2026-1249 A flaw was found in GLib. A state confusion issue exists in g_dbus_node_info_new_for_xml() in the...

A flaw was found in GLib. A state confusion issue exists in gdbusnodeinfonewforxml in the gio/gdbusintrospection.c file when processing malformed D-Bus introspection XML, specifically with a node element nested within other elements like method, signal, property or arg. This issue can cause an...

JLSEC-2026-1246 A flaw was found in GLib. A buffer over-read can occur in g_io_channel_read_line_backend() in the...

A flaw was found in GLib. A buffer over-read can occur in giochannelreadlinebackend in the giochannel.c file when a custom line terminator with a length greater than one is set, causing memcmp to read past the GString buffer. This vulnerability can cause a minor information disclosure of 7 bytes ...

JLSEC-2026-1248 A flaw was found in GLib. The D-Bus client-side implementation of the DBUS_COOKIE_SHA1 SASL...

A flaw was found in GLib. The D-Bus client-side implementation of the DBUSCOOKIESHA1 SASL authentication mechanism does not validate the cookiecontext parameter received from the server. A malicious D-Bus server can supply a cookiecontext containing path traversal sequences, causing the client to...

JLSEC-2026-1247 A flaw was found in GLib. An off-by-one error can occur in the g_key_file_get_locale_string_list...

A flaw was found in GLib. An off-by-one error can occur in the gkeyfilegetlocalestringlist function in the gkeyfile.c file when loading a key file with an empty value. This flaw can cause an out-of-bounds access of 1 byte or a denial of service when the out-of-bounds access crosses a page boundar...

JLSEC-2026-1242 ncurses v6.5 and v6.4 are vulnerable to Buffer Overflow in progs/infocmp.c, function...

The infocmp command-line tool in ncurses before 6.5-20251213 has a stack-based buffer overflow in analyzestring in progs/infocmp.c...

JLSEC-2026-1240

Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling...

JLSEC-2026-1241

A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML Schema Definition XSD validated document that includes an internal entity reference. An attacker could exploit this by providing a malicious document, leading to a type confusion error that...

JLSEC-2026-1237

A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may...

JLSEC-2026-1239

A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when processing XML catalogs that contain repeated elements pointing to the same downstream catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to...