4.2

CVE-2026-56664: zitadel Insufficient Session Expiration

CVSS: 4.2v3.1MediumDeferred
AliasesGHSA-wxg7-w2v3-w38gGO-2026-5732
Published 10-07-2026Last modified 10-07-2026
Open JSON

Vulnerability summary

CVE-2026-56664 is a medium (CVSS 4.2) Insufficient Session Expiration vulnerability in zitadel. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.5% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.2/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.32%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 10-07-2026
    PublishedVulnerability first disclosed.
  2. 10-07-2026
    Last modifiedVulnerability information updated.

Description

ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's external JWT Identity Provider validation in internal/idp/providers/jwt/session.go skips the maximum token age freshness check when an incoming token omits the iat claim, allowing arbitrarily old tokens from a trusted issuer to pass authentication. This issue is fixed in versions 3.4.12 and 4.15.2.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

0.00 pp

From 0.32% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.32%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Github.com/zitadel1 product
  • zitadel< 1.80.0-v2.20.0.20260615122908-fad02c6d9f45
Zitadel1 product
  • zitadel≥ 4.0.0-rc.1, < 4.15.2 | < 3.4.12

2 vendors · 2 products

References

8 links