What is CVE-2026-109362?

CVE-2026-109362 is a medium-severity vulnerability in Heymrun Heym, classified under Insufficient Session Expiration. CVSS score: 5.4/10. Published 2026-10-12.

How severe is CVE-2026-109362?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Heymrun Heym

CVE-2026-109362

Heym v0.0.5 before v0.0.113 contains a broken access control vulnerability that allows former collaborators to keep executing JWT-auth workflows by reusing scoped workflow:execute tokens after share removal. Attackers can mint a token with a TTL up to 10 years, which the owner cannot list or revoke, and repeatedly run the workflow consuming shared credentials.

Published 2026-10-12 · last modified 2026-10-12.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Heymrun Heym

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

github.com/heymrun/heym/security/advisories/GHSA-pwr6-6377-3cgv (vendor-advisory)
www.vulncheck.com/advisories/heym-0.0.5-before-0.0.113-broken-access-control-vi… (third-party-advisory)

Frequently asked questions

What is CVE-2026-109362?: CVE-2026-109362 is a medium-severity vulnerability in Heymrun Heym, classified under Insufficient Session Expiration. CVSS score: 5.4/10. Published 2026-10-12.
How severe is CVE-2026-109362?: Medium severity. CVSS v3 base score is 5.4 out of 10.