CVE-2026-102269

The PyJWT Python library (prior to version 2.14.0 ) is vulnerable to a signature segment decoding issue. The library incorrectly accepts characters outside the canonical Base64URL representation, allowing non-Base64URL characters to be appended to a valid compact JWS signature segment. Because ba...

PyJWT: Unauthenticated DoS via unbounded Base64URL decoding of unused payload segment in b64=false detached JWS

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Security update for python-PyJWT

This update for python-PyJWT fixes the following issues CVE-2026-48522: PyJWKClient passes URI arguments directly to urllib.request.urlopen and allows for SSRF and token forgery bsc1266798. CVE-2026-48523: verifier-side algorithm allow-list bypass when jwt.decode or jwt.decodecomplete are called...

SUSE-SU-2026:2627-1 Security update for python-PyJWT

This update for python-PyJWT fixes the following issues - CVE-2026-48522: PyJWKClient passes URI arguments directly to urllib.request.urlopen and allows for SSRF and token forgery bsc1266798. - CVE-2026-48523: verifier-side algorithm allow-list bypass when jwt.decode or jwt.decodecomplete are...

SUSE-SU-2026:22220-1 Security update for python-PyJWT

This update for python-PyJWT fixes the following issues - CVE-2026-48522: PyJWKClient passes URI arguments directly to urllib.request.urlopen and allows for SSRF and token forgery bsc1266798. - CVE-2026-48523: verifier-side algorithm allow-list bypass when jwt.decode or jwt.decodecomplete are...

SUSE-SU-2026:22170-1 Security update for python-PyJWT

This update for python-PyJWT fixes the following issues - CVE-2026-48522: PyJWKClient passes URI arguments directly to urllib.request.urlopen and allows for SSRF and token forgery bsc1266798. - CVE-2026-48523: verifier-side algorithm allow-list bypass when jwt.decode or jwt.decodecomplete are...

SUSE-SU-2026:22138-1 Security update for python-PyJWT

This update for python-PyJWT fixes the following issues - CVE-2026-48522: PyJWKClient passes URI arguments directly to urllib.request.urlopen and allows for SSRF and token forgery bsc1266798. - CVE-2026-48523: verifier-side algorithm allow-list bypass when jwt.decode or jwt.decodecomplete are...

PyJWT: Unauthenticated DoS via unbounded Base64URL decoding of unused payload segment in b64=false detached JWS

!NOTE Practical impact depends on whether request body-size limits are enforced upstream proxy/web-server/framework. Deployments with typical body-size caps ≤2 MB bound the amplifier significantly; deployments accepting larger token inputs are more exposed. When verifying detached JWS tokens usin...

SUSE CVE-2026-48525

PyJWT is a JSON Web Token implementation in Python. From 2.8.0 to 2.12.1, when verifying detached JWS tokens using the unencoded-payload option "b64": false, RFC 7797, PyJWT performs Base64URL decoding of the compact-serialization payload segment before enforcing the detached-payload rules. For...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the Base64URL decoding process. An attacker can cause excessive CPU and memory consumption by supplying an arbitrarily large payload segment when verifying detached JWS tokens wit...

PYSEC-0000-CVE-2026-48525

PyJWT is a JSON Web Token implementation in Python. From 2.8.0 to 2.12.1, when verifying detached JWS tokens using the unencoded-payload option "b64": false, RFC 7797, PyJWT performs Base64URL decoding of the compact-serialization payload segment before enforcing the detached-payload rules. For...

AZL-93042 CVE-2026-48525 affecting package python-jwt for versions less than 2.13.0-1

PyJWT is a JSON Web Token implementation in Python. From 2.8.0 to 2.12.1, when verifying detached JWS tokens using the unencoded-payload option "b64": false, RFC 7797, PyJWT performs Base64URL decoding of the compact-serialization payload segment before enforcing the detached-payload rules. For...

CVE-2026-48525

PyJWT is a JSON Web Token implementation in Python. From 2.8.0 to 2.12.1, when verifying detached JWS tokens using the unencoded-payload option "b64": false, RFC 7797, PyJWT performs Base64URL decoding of the compact-serialization payload segment before enforcing the detached-payload rules. For...

CVE-2026-48525

PyJWT is a JSON Web Token implementation in Python. From 2.8.0 to 2.12.1, when verifying detached JWS tokens using the unencoded-payload option "b64": false, RFC 7797, PyJWT performs Base64URL decoding of the compact-serialization payload segment before enforcing the detached-payload rules. For...

CVE-2026-48525

PyJWT is a JSON Web Token implementation in Python. From 2.8.0 to 2.12.1, when verifying detached JWS tokens using the unencoded-payload option "b64": false, RFC 7797, PyJWT performs Base64URL decoding of the compact-serialization payload segment before enforcing the detached-payload rules. For...

CVE-2026-48525 PyJWT: Unauthenticated DoS via unbounded Base64URL decoding of unused payload segment in b64=false detached JWS

PyJWT is a JSON Web Token implementation in Python. From 2.8.0 to 2.12.1, when verifying detached JWS tokens using the unencoded-payload option "b64": false, RFC 7797, PyJWT performs Base64URL decoding of the compact-serialization payload segment before enforcing the detached-payload rules. For...

CVE-2026-48525

PyJWT (Python) versions 2.8.0–2.12.1 expose an unauthenticated DoS when verifying detached JWS with the unencoded-payload option (b64: false, RFC 7797). PyJWT decodes the middle payload segment for detached-payload verification, then discards it and replaces it with the caller-provided detached_p...

GHSA-73J8-2GCH-69RQ .NET Denial of Service Vulnerability

Microsoft Security Advisory CVE-2026-26127 – .NET Denial of Service Vulnerability Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 9.0 and .NET 10.0. This advisory also provides guidance on what developers can do to update their...

Out-of-bounds Read

Overview Affected versions of this package are vulnerable to Out-of-bounds Read when decoding malformed Base64Url input. An attacker can cause a disruption of service. Remediation Upgrade Microsoft.NETCore.App.Runtime.win-x64 to version 9.0.14, 10.0.4 or higher. References - GitHub Commit - GitHu...

CVE-2026-21899 CryptoLib has an out-of-bounds read and crash vulnerability when decoding an empty Base64url string

CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures SDLS-EP to secure communications between a spacecraft running the core Flight System cFS and a ground station. Prior to version 1.4.3, in base64urlDecode, padding-stripping...