CVE-2026-101049: Auth Bypass (CVSS 6.5)

Description

Heym before 0.0.53 fails to verify Slack request signatures when trigger nodes lack credential IDs or have empty signing secrets. Remote unauthenticated attackers can send forged Slack events to known webhook URLs to trigger workflows with the owner's credentials.

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CVSS v3.1 Score

6.5

MEDIUM

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

EPSS — Exploit Prediction

0.0030

Probability of exploitation

0.21%

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-287 Improper Authentication

References

Other References

https://github.com/heymrun/heym/commit/341d1012367cd74f85c617e1c98dd49e3fcb5e83 https://github.com/heymrun/heym/security/advisories/GHSA-pm6h-x3h5-j38h https://www.vulncheck.com/advisories/heym-before-0.0.53-slack-webhook-signature-verification-bypass https://github.com/heymrun/heym/security/advisories/GHSA-pm6h-x3h5-j38h

Frequently Asked Questions

What is CVE-2026-101049? +

Heym before 0.0.53 fails to verify Slack request signatures when trigger nodes lack credential IDs or have empty signing secrets. Remote unauthenticated attackers can send forged Slack events to known webhook URLs to trigger workflows with the owner's credentials. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-101049? +

CVE-2026-101049 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0030, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-101049? +

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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