CVE-2026-3456-OAuth2-PKCE-Race-Condition-Account-Takeover-

8. CVE-2026-3456 – OAuth2 PKCE Race Condition Account Takeover Overview A race condition in the OAuth2 authorization server allows an attacker to reuse a victim’s authorization code before the legitimate client redeems it, by guessing or brute‑forcing the PKCE codeverifier within a small time...

SUSE SLED15 / SLES15 Security Update : python-oauthlib (SUSE-SU-2026:4810-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4810-1 advisory. - CVE-2026-49264: Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript...

Security update for python-oauthlib

This update for python-oauthlib fixes the following issues: CVE-2026-49264: Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation bsc1283526. CVE-2026-49265: Oauthlib: Timing Attack Vulnerability in PKCE codeverifier Comparison bsc1283527...

Linux Distros Unpatched Vulnerability : CVE-2026-49265

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in...

openSUSE 16 Security Update : python-oauthlib (openSUSE-SU-2026:22103-1)

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:22103-1 advisory. - CVE-2026-49264: Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation bsc1283526. -...

Security update for python-oauthlib (moderate)

openSUSE security update: security update for python-oauthlib ------------------------------------------------------------- Announcement ID: openSUSE-SU-2026:22103-1 Rating: moderate References: bsc1283526 bsc1283527 Cross-References: CVE-2026-49264 CVE-2026-49265 CVSS scores: CVE-2026-49264 SUSE...

OPENSUSE-SU-2026:22103-1 Security update for python-oauthlib

This update for python-oauthlib fixes the following issues: - CVE-2026-49264: Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation bsc1283526. - CVE-2026-49265: Oauthlib: Timing Attack Vulnerability in PKCE codeverifier Comparison...

SUSE-SU-2026:24246-1 Security update for python-oauthlib

This update for python-oauthlib fixes the following issues: - CVE-2026-49264: Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation bsc1283526. - CVE-2026-49265: Oauthlib: Timing Attack Vulnerability in PKCE codeverifier Comparison...

SUSE-SU-2026:24189-1 Security update for python-oauthlib

This update for python-oauthlib fixes the following issues: - CVE-2026-49264: Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation bsc1283526. - CVE-2026-49265: Oauthlib: Timing Attack Vulnerability in PKCE codeverifier Comparison...

AZL-108045 CVE-2026-49265 affecting package python-oauthlib for versions less than 3.2.2-4

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/granttypes/authorizationcode.py compare attacker-supplied codeverifier values with stored challenges using ordinary string equality in...

DEBIAN-CVE-2026-49265

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/granttypes/authorizationcode.py compare attacker-supplied codeverifier values with stored challenges using ordinary string equality in...

UBUNTU-CVE-2026-49265

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/granttypes/authorizationcode.py compare attacker-supplied codeverifier values with stored challenges using ordinary string equality in...

CVE-2026-49265

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/granttypes/authorizationcode.py compare attacker-supplied codeverifier values with stored challenges using ordinary string equality in...

EUVD-2026-98833

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/granttypes/authorizationcode.py compare attacker-supplied codeverifier values with stored challenges using ordinary string equality in...

CVE-2026-49265 OAuthLib: Timing Attack Vulnerability in PKCE code_verifier Comparison

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/granttypes/authorizationcode.py compare attacker-supplied codeverifier values with stored challenges using ordinary string equality in...

CVE-2026-49265 OAuthLib: Timing Attack Vulnerability in PKCE code_verifier Comparison

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/granttypes/authorizationcode.py compare attacker-supplied codeverifier values with stored challenges using ordinary string equality in...

CVE-2026-49265 OAuthLib: Timing Attack Vulnerability in PKCE code_verifier Comparison

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/granttypes/authorizationcode.py compare attacker-supplied codeverifier values with stored challenges using ordinary string equality in...

CVE-2026-49265

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/granttypes/authorizationcode.py compare attacker-supplied codeverifier values with stored challenges using ordinary string equality in...

CVE-2026-49265

The OAuthLib library (versions 3.0.0 through 4.0.0 ) is vulnerable to a timing side-channel attack during PKCE validation. The issue exists in oauthlib/oauth2/rfc6749/grant_types/authorization_code.py because the code_challenge_method_plain and code_challenge_method_s256 functions use ordinary st...

CVE-2026-49265: Observable Timing Discrepancy

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/granttypes/authorizationcode.py compare attacker-supplied codeverifier values with stored challenges using ordinary string equality in...