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CVE-2026-105396GHSA-6rv3-wh25-7pg5

Heym before v0.0.112 HITL Review Token Leak via Spoofable Origin Header

heymrun heym
Open in ThreatlineRecord JSON
CVSS
5.3Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.10%Chance of exploitation activity in the next 30 days, higher than 0% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in0.0.112Fixed versionCVE List
Published5 Oct 2026Updated 5 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Heym before v0.0.112 contains a token leakage vulnerability in build_public_base_url() that allows unauthenticated attackers to redirect HITL review links by spoofing Origin or X-Forwarded-Host headers. Attackers can trigger anonymous workflows with forged headers so reviewer notifications point to attacker domains, capturing capability tokens to submit decisions executed with owner credentials.

Text from CVE List

Affected versions 2

  • heymaffected: all versions before 0.0.112CVE List
  • heymunaffected: 0.0.112CVE List

References 2