CVE-2026-101049
published 2026-09-27CVE-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…
PriorityP342medium6.5CVSS 3.1
AVNACHPRNUINSUCLIHAN
EPSS
0.30%
20.4th percentile
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.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| heymrun | heym | < 0.0.53 | 0.0.53 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
nvdv4.08.3HIGHCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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GHSA
Heym before 0.0.53 fails to verify Slack request signatures when trigger nodes lack credential IDs or have empty signing secrets.
ghsa_unreviewed·2026-09-27
CVE-2026-101049 [HIGH] CWE-287 Heym before 0.0.53 fails to verify Slack request signatures when trigger nodes lack credential IDs or have empty signing secrets.
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.
VulDB
Heymrun Heym up to 0.0.52 Signature Verification improper authentication
vuldb·2026-09-27·CVSS 6.5
CVE-2026-101049 [MEDIUM] Heymrun Heym up to 0.0.52 Signature Verification improper authentication
A vulnerability has been found in Heymrun Heym up to 0.0.52 and classified as critical. Affected by this issue is some unknown functionality of the component Signature Verification. This manipulation causes improper authentication.
This vulnerability is tracked as CVE-2026-101049. The attack is possible to be carried out remotely. No exploit exists.
The affected component should be upgraded.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/heymrun/heym/commit/341d1012367cd74f85c617e1c98dd49e3fcb5e83https://github.com/heymrun/heym/security/advisories/GHSA-pm6h-x3h5-j38hhttps://www.vulncheck.com/advisories/heym-before-0.0.53-slack-webhook-signature-verification-bypasshttps://github.com/heymrun/heym/security/advisories/GHSA-pm6h-x3h5-j38h
2026-09-27
Published