CVE-2026-67541: Auth Bypass (CVSS 8.1)

Description

Heym builds and runs agentic systems and business-process automations on self-hosted infrastructure. Prior to version 0.0.70, team-member management (add / remove / update) is gated only on team membership, not on the team creator/admin role — and TeamMember has no role column. Any non-creator member can seat an attacker account into the team; because credential team-shares are scoped only by TeamMember.user_id, the newly-added attacker can then decrypt every credential shared into that team (provider API keys, OAuth tokens. This issue has been patched in version 0.0.70.

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CVSS v3.1 Score

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0040

Probability of exploitation

0.34%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-266 CWE-266

CWE-862 Missing Authorization

References

Other References

https://github.com/heymrun/heym/commit/863e2702fca9a584246da9a51cca6b12828cebcf https://github.com/heymrun/heym/commit/a9fc3d864e87fa2449b235798189db9cd39367c4 https://github.com/heymrun/heym/commit/def26b5cf77dad4a9c5b5ff11c9863a0bc144ac8 https://github.com/heymrun/heym/releases/tag/0.0.70 https://github.com/heymrun/heym/security/advisories/GHSA-vxpw-x7j7-8723

Frequently Asked Questions

What is CVE-2026-67541? +

Heym builds and runs agentic systems and business-process automations on self-hosted infrastructure. Prior to version 0.0.70, team-member management (add / remove / update) is gated only on team membership, not on the team creator/admin role — and TeamMember has no role column. Any non-creator member can seat an attacker account into the team; because credential team-shares are scoped only by TeamMember.user_id, the newly-added attacker can then decrypt every credential shared into that team (provider API keys, OAuth tokens. This issue has been patched in version 0.0.70. It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-67541? +

CVE-2026-67541 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0040, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-67541? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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