CVE-2026-102268 PyJWT: Asymmetric-PEM detection bypass: whitespace/line-ending-mutated public keys skip the HS/asymmetric confusion guard

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, ispemformat in jwt/utils.py is affected because ispemformat does not recognize every PEM representation accepted by the cryptography loader. This occurs when an application mixes HMAC and asymmetric algorithms and...

EUVD-2026-88535

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, ispemformat in jwt/utils.py is affected because ispemformat does not recognize every PEM representation accepted by the cryptography loader. This occurs when an application mixes HMAC and asymmetric algorithms and...

CVE-2026-102268 PyJWT: Asymmetric-PEM detection bypass: whitespace/line-ending-mutated public keys skip the HS/asymmetric confusion guard

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, ispemformat in jwt/utils.py is affected because ispemformat does not recognize every PEM representation accepted by the cryptography loader. This occurs when an application mixes HMAC and asymmetric algorithms and...

CVE-2026-102268

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, ispemformat in jwt/utils.py is affected because ispemformat does not recognize every PEM representation accepted by the cryptography loader. This occurs when an application mixes HMAC and asymmetric algorithms and...

CVE-2026-102266

The PyJWT library (Python implementation of JSON Web Token standards) is vulnerable in versions 2.13.0 through 2.14.0 due to a flaw in the HMACAlgorithm.from_jwk method. The PyJWK verification path fails to apply prepare_key validation when a trusted JWK Set contains an oct entry with an empty k ...

CVE-2026-102266 PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation

PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, HMACAlgorithm.fromjwk is affected because PyJWK verification path used the decoded key without applying preparekey validation. This occurs when a trusted JWK Set contains an oct entry with an empty k value. As...

CVE-2026-102266 PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation

PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, HMACAlgorithm.fromjwk is affected because PyJWK verification path used the decoded key without applying preparekey validation. This occurs when a trusted JWK Set contains an oct entry with an empty k value. As...

CVE-2026-102266 PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation

PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, HMACAlgorithm.fromjwk is affected because PyJWK verification path used the decoded key without applying preparekey validation. This occurs when a trusted JWK Set contains an oct entry with an empty k value. As...

CVE-2026-59563

Zscaler MCP Server versions 0.7.0 and 0.7.1 has an issue where HMAC confirmation tokens were not bound to the target resource identifier, allowing an MCP client or agent to replay a token generated for one resource to affect another resource of the same type. This issue is fixed in version 0.7.2...

EUVD-2026-88244

Zscaler MCP Server versions 0.7.0 and 0.7.1 has an issue where HMAC confirmation tokens were not bound to the target resource identifier, allowing an MCP client or agent to replay a token generated for one resource to affect another resource of the same type. This issue is fixed in version 0.7.2...

CVE-2026-59563 HMAC Confirmation Token Unbinding in zscaler-mcp-server

Zscaler MCP Server versions 0.7.0 and 0.7.1 has an issue where HMAC confirmation tokens were not bound to the target resource identifier, allowing an MCP client or agent to replay a token generated for one resource to affect another resource of the same type. This issue is fixed in version 0.7.2...

CVE-2026-59563 HMAC Confirmation Token Unbinding in zscaler-mcp-server

Zscaler MCP Server versions 0.7.0 and 0.7.1 has an issue where HMAC confirmation tokens were not bound to the target resource identifier, allowing an MCP client or agent to replay a token generated for one resource to affect another resource of the same type. This issue is fixed in version 0.7.2...

CVE-2026-59563

The Zscaler MCP Server versions 0.7.0 and 0.7.1 are vulnerable to a token replay issue. The root cause is that HMAC confirmation tokens are not bound to the target resource identifier. This allows an MCP client or agent to replay a token intended for one resource to impact another resource of the...

PT-2026-99880

Name of the Vulnerable Software and Affected Versions Zscaler MCP Server versions 0.7.0 through 0.7.1 Description HMAC confirmation tokens are not bound to the target resource identifier. This allows an MCP client or agent to replay a token generated for one resource to affect another resource of...

CVE-2026-59563: Authentication Bypass by Primary Weakness

Zscaler MCP Server versions 0.7.0 and 0.7.1 has an issue where HMAC confirmation tokens were not bound to the target resource identifier, allowing an MCP client or agent to replay a token generated for one resource to affect another resource of the same type. This issue is fixed in version 0.7.2...

CVE-2026-102273: Improper Verification of Cryptographic Signature

PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, PyJWT HMACAlgorithm.preparekey is affected because HMAC key guard only recognizes top-level public JWK forms and misses container representations. This occurs when an application allows HMAC and asymmetric...

PT-2026-102365

Name of the Vulnerable Software and Affected Versions PyJWT versions 2.13.0 through 2.13.x Description The HMACAlgorithm.prepare key function is affected because the HMAC key guard only recognizes top-level public JSON Web Key JWK forms and fails to identify container representations. This occurs...

CVE-2026-102268: Improper Verification of Cryptographic Signature

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, ispemformat in jwt/utils.py is affected because ispemformat does not recognize every PEM representation accepted by the cryptography loader. This occurs when an application mixes HMAC and asymmetric algorithms and...

openSUSE 16 Security Update : cjose (openSUSE-SU-2026:21944-1)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21944-1 advisory. - CVE-2026-53938: missing encryptedkey length validation during AES Key Wrap decryption can cause heap- based buffer overflow bsc1279844. -...

Security Bulletin: IBM InfoSphere Optim Archive Viewer is affected by a signature verification bypass vulnerability in joserfc (CVE-2026-49852)

Summary An authentication and signature verification bypass vulnerability in the joserfc JSON Object Signing and Encryption JOSE library CVE-2026-49852 used by IBM InfoSphere Optim Archive Viewer has been addressed by upgrading the component to version 1.6.8. Vulnerability Details...