4.9

CVE-2026-102270: jpadilla pyjwt

CVSS: 4.9v3.1MediumAnalyzed
AliasesGHSA-jwrc-g2q2-pq5pPYSEC-2026-4148UBUNTU-CVE-2026-102270
Published 28-09-2026Last modified 29-09-2026
Open JSON

Vulnerability summary

CVE-2026-102270 is a medium (CVSS 4.9) vulnerability in jpadilla pyjwt. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.8% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.9/10
010
Medium · v3.1 (NVD)
EPSS score
0.21%
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 is_pem_format is affected because lazy PEM regular expression backtracks extensively. This occurs when a certificate-like input contains repeated BEGIN markers without a matching END marker. As a result, is_pem_format performs unbounded backtracking while searching for a PEM end marker. Consequently, an attacker can cause intensive CPU consumption. This issue is fixed in version 2.14.0.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

29-09-202619-10-2026
EPSS score
0.21%

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
  • 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)
Wolfi1 product
  • datadog-agent-7.78-core-integrationsAll versions (No fix recorded)

7 vendors · 15 products

References

11 links
Show all 11 references