4.2

CVE-2026-56665: zitadel Insufficient Session Expiration

CVSS: 4.2v3.1MediumDeferred
AliasesGHSA-v77h-2w3m-94hxGO-2026-6469
Published 10-07-2026Last modified 10-07-2026
Open JSON

Vulnerability summary

CVE-2026-56665 is a medium (CVSS 4.2) Insufficient Session Expiration vulnerability in zitadel. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.2% 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
0.27%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2026:21897-1SUSE-SU-2026:23855-1SUSE-SU-2026:23863-1

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 is an open source identity management platform. From 3.0.0-rc.1 through 3.4.11 and from 4.0.0-rc.1 through 4.15.1, ZITADEL's external JWT Identity Provider validation in internal/idp/providers/jwt/session.go skips expiration handling when an incoming token omits the exp claim, allowing a token from a trusted issuer to be treated as valid without an automatic expiration window. This issue is fixed in versions 3.4.12 and 4.15.2.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.27%

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≥ 4.0.0-rc.1, < 4.15.2 | < 3.4.12 | All versions (No fix recorded)
Zitadel1 product
  • zitadel≥ 4.0.0-rc.1, < 4.15.2 | < 3.4.12

2 vendors · 2 products

References

7 links