Incorrect Behavior Order: Validate Before Canonicalize Affecting litellm package, versions <1.103.1-r1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.19% (8th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LITELLM-20341464
  • published1 Oct 2026
  • disclosed28 Sept 2026

Introduced: 28 Sep 2026

NewCVE-2026-102269  (opens in a new tab)
CWE-180  (opens in a new tab)

How to fix?

Upgrade Chainguard litellm to version 1.103.1-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream litellm package and not the litellm package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT signature segment is affected because signature segment decoding accepts characters outside the canonical Base64URL representation. This occurs when non-Base64URL characters are appended to a valid compact JWS signature segment. As a result, base64url_decode produces the same signature bytes for different serialized segments. Consequently, raw-token revocation checks can fail to recognize an equivalent modified token. This issue is fixed in version 2.14.0.

CVSS Base Scores

version 3.1