2407 matches found
SignXML's signature verification with HMAC is vulnerable to an algorithm confusion attack
When verifying signatures with X509 certificate validation turned off and HMAC shared secret set signxml.XMLVerifier.verifyrequirex509=False, hmackey=..., prior versions of SignXML are vulnerable to a potential algorithm confusion attack. Unless the user explicitly limits the expected signature...
SignXML's signature verification with HMAC is vulnerable to a timing attack
When verifying signatures with X509 certificate validation turned off and HMAC shared secret set signxml.XMLVerifier.verifyrequirex509=False, hmackey=..., prior versions of SignXML are vulnerable to a potential timing attack. The verifier may leak information about the correct HMAC when comparing...
OPENSUSE-SU-2026:21263-1 Security update for python-joserfc
This update for python-joserfc fixes the following issues: Changes in python-joserfc: - CVE-2026-49852: HS256/HS384/HS512 verify accepts empty/nil HMAC key bsc1270234...
python-pyjwt: PyJWT: Authentication bypass due to forged JSON Web Tokens
A flaw was found in PyJWT, a Python library for JSON Web Token JWT implementation. When decoding JWTs, the library fails to validate the use of JSON Web Keys JWK in the HMAC algorithm while also supporting asymmetric algorithms. This allows a remote attacker to use the issuer's public key as the...
python-pyjwt: PyJWT: Authentication bypass due to forged JSON Web Tokens
A flaw was found in PyJWT, a Python library for JSON Web Token JWT implementation. When decoding JWTs, the library fails to validate the use of JSON Web Keys JWK in the HMAC algorithm while also supporting asymmetric algorithms. This allows a remote attacker to use the issuer's public key as the...
python-pyjwt: PyJWT: Authentication bypass due to forged JSON Web Tokens
A flaw was found in PyJWT, a Python library for JSON Web Token JWT implementation. When decoding JWTs, the library fails to validate the use of JSON Web Keys JWK in the HMAC algorithm while also supporting asymmetric algorithms. This allows a remote attacker to use the issuer's public key as the...
CVE-2026-58426
The CVE-2026-58426 affects Gitea, specifically the Actions Artifacts V4 signed URL mechanism, where an HMAC ambiguity enables cross-repository artifact read and cross-task upload-state write. The vulnerability stems from how signed URLs are validated, allowing unauthorized access across repositor...
CVE-2026-58426 Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write
Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write...
CVE-2026-58426 Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write
Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write...
CVE-2026-58426 Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write
Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write...
CVE-2026-58426: Improper Verification of Cryptographic Signature
Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write...
GHSA-GG9X-QCX2-XMRH joserfc: HS256/HS384/HS512 verify accepts empty/nil HMAC key (cross-language sibling of CVE-2026-45363)
Summary joserfc.jwt.decode accepts attacker-forged HMAC-signed tokens when the caller-supplied verification key is the empty string or None. HMACAlgorithm.sign and HMACAlgorithm.verify in src/joserfc/rfc7518/jwsalgs.py:62-70 feed whatever OctKey.getopkey... produced into hmac.new..., and...
K000162031: Node.js vulnerability CVE-2026-21713
Security Advisory Description A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurement...
PT-2026-55459
Name of the Vulnerable Software and Affected Versions joserfc versions 1.6.7 and earlier Description An authentication bypass exists when the verification key provided to joserfc.jwt.decode is an empty string or None. This occurs because the HMACAlgorithm.verify and HMACAlgorithm.sign functions...
python-pyjwt: PyJWT: Authentication bypass due to forged JSON Web Tokens
A flaw was found in PyJWT, a Python library for JSON Web Token JWT implementation. When decoding JWTs, the library fails to validate the use of JSON Web Keys JWK in the HMAC algorithm while also supporting asymmetric algorithms. This allows a remote attacker to use the issuer's public key as the...
python-pyjwt: PyJWT: Authentication bypass due to forged JSON Web Tokens
A flaw was found in PyJWT, a Python library for JSON Web Token JWT implementation. When decoding JWTs, the library fails to validate the use of JSON Web Keys JWK in the HMAC algorithm while also supporting asymmetric algorithms. This allows a remote attacker to use the issuer's public key as the...
PT-2026-57508
Summary The LoginLink signature used for password reset URLs covers only the user's id — it does not include the password hash. After a user clicks a reset link and successfully changes their password, the same link remains valid for up to 2 additional uses within a 1-hour window. Anyone who...
FreeBSD : FreeBSD -- Remote DOS via uninitialized memory access in KTLS receive (fb1bf2ae-74e2-11f1-958d-bc241121aa0a)
The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the fb1bf2ae-74e2-11f1-958d-bc241121aa0a advisory. When building the iovec array for a received TLS 1.2 CBC record, ktlsocftlscbcdecrypt incremented the...
Linux Distros Unpatched Vulnerability : CVE-2026-6331
The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - HMAC zero-length tag forgery in EVPDigestVerifyFinal, where a zero-length tag could be accepted as valid during HMAC verification. In the OpenSSL-compatibility...
PT-2026-70016
When building the iovec array for a received TLS 1.2 CBC record, ktls ocf tls cbc decrypt incremented the iovec index for every mbuf in the chain, including mbufs that were skipped because they contained only TLS header bytes. This left uninitialized entries in the iovec array. The iovec array wa...