CVE-2026-105208ZITADEL before 4.17.3 Session Hijacking via Forgeable IdP Intent Tokens
Updated under an hour ago ()
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It affects zitadel. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.08%, higher than 0% of scored CVEs.
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ZITADEL 4.x before 4.17.3 and 3.x through 3.4.15 protects IdP intent tokens with unauthenticated, malleable encryption, allowing authenticated users to tamper with their own token so it is accepted for another user's external login intent. An attacker who predicts a victim's in-flight intent identifier and wins a timing race can call /v2/idp_intents or /v2/sessions to steal the victim's IdP tokens or hijack their session.
- CVSS
- 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
- Weakness (CWE)
- CWE-649
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.08% (percentile 0)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
zitadel zitadel zitadel:zitadel (from the name) | before 4.17.3; 4.17.3 not affected | CNA record |
References
- https://github.com/zitadel/zitadel/security/advisories/GHSA-jh3m-cr2x-qp88vendor-advisory
- https://www.vulncheck.com/advisories/zitadel-before-4.17.3-session-hijacking-via-forgeable-idp-intent-tokensthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.