5.4

CVE-2026-102269: jpadilla pyjwt

CVSS: 5.4v3.1MediumAnalyzed
AliasesGHSA-hxm8-2xgr-2p9mPYSEC-2026-4147UBUNTU-CVE-2026-102269
Published 28-09-2026Last modified 29-09-2026
Open JSON

Vulnerability summary

CVE-2026-102269 is a medium (CVSS 5.4) vulnerability in jpadilla pyjwt. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (NVD)
EPSS score
0.19%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
OPENSUSE-SU-2026:11994-1OPENSUSE-SU-2026:22074-1SUSE-SU-2026:24126-1SUSE-SU-2026:24134-1

Timeline

  1. 28-09-2026
    PublishedVulnerability first disclosed.
  2. 29-09-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

29-09-202619-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Pyjwt

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Chainguard79 products
  • airflow-2< 2.11.2-r25
  • airflow-core-2All versions (No fix recorded)
  • authentik-2026.5< 2026.5.7-r4
  • authentik-fips-2026.5< 2026.5.7-r7
  • azureml-inference-server-httpAll versions (No fix recorded)
Wolfi12 products
  • datadog-agent-7.77-core-integrations< 7.77.3-r26
  • datadog-agent-7.78-core-integrationsAll versions (No fix recorded)
  • datadog-agent-7.79-core-integrations< 7.79.2-r20
  • datadog-agent-7.80-core-integrationsAll versions (No fix recorded)
  • datadog-agent-7.81-core-integrations< 7.81.3-r8
Debian1 product
  • pyjwtAll versions (No fix recorded) | < 2.14.0-1
Jpadilla1 product
Pyjwt_project1 product
PyPI1 product
  • pyjwt< 2.14.0
Ubuntu1 product
  • pyjwtAll versions (No fix recorded)

7 vendors · 96 products

References

11 links
Show all 11 references