6.5

CVE-2026-103001: jpadilla pyjwt

CVSS: 6.5v3.1MediumAnalyzed
AliasesGHSA-gvp8-978c-rx2qPYSEC-2026-4146UBUNTU-CVE-2026-103001
Published 30-09-2026Last modified 05-10-2026
Open JSON

Vulnerability summary

CVE-2026-103001 is a medium (CVSS 6.5) vulnerability in jpadilla pyjwt. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2026:11994-1OPENSUSE-SU-2026:22074-1SUSE-SU-2026:24126-1

Timeline

  1. 30-09-2026
    PublishedVulnerability first disclosed.
  2. 05-10-2026
    Last modifiedVulnerability information updated.

Description

PyJWT is a Python implementation of JSON Web Token standards. From 2.11.0 through 2.13.0, PyJWT's PyJWT._merge_options() method can modify a caller-supplied mutable options mapping when verify_signature is false. If an application reuses that same mapping for a later decode() or decode_complete() call and changes verify_signature to true, the mapping can retain false values for expiration, not-before, issued-at, audience, issuer, subject, and JWT ID checks. A signed token with invalid registered claims can then be accepted without disabling signature verification, but applications that create a fresh options mapping for each call are not affected.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

01-10-202620-10-2026
EPSS score
0.24%

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

Chainguard9 products
  • authentik-fips-2026.5< 2026.5.7-r7
  • datadog-agent-7.78-core-integrationsAll versions (No fix recorded)
  • datadog-agent-7.84-core-integrations< 7.84.1-r1
  • datadog-agent-fips-7.78-core-integrationsAll versions (No fix recorded)
  • datadog-agent-fips-7.84-core-integrationsAll versions (No fix recorded) | < 7.84.2-r3
Debian1 product
  • pyjwt< 2.14.0-1
Jpadilla1 product
  • pyjwt≥ 2.11.0, ≤ 2.13.0
Pyjwt_project1 product
  • pyjwt≥ 2.11.0, < 2.13.0
PyPI1 product
  • pyjwt≥ 2.11.0, ≤ 2.13.0
Ubuntu1 product
  • pyjwtAll versions (No fix recorded)
Wolfi1 product
  • datadog-agent-7.78-core-integrationsAll versions (No fix recorded)

7 vendors · 15 products

References

11 links
Show all 11 references