CVE-2026-67542: heymrun heym · Server-Side Request Forgery
Affects heymrun heymSource CVE Database V5
Not known to be exploited · CVSS 7.1 High : upgrade to 0.0.70 soon.
Data as of 11 Nov 2026, 22:04 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 7.1 |
|---|
- Patch
- Available – fixed in 0.0.70
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 11 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.
What to do
Upgrade heymrun heym to 0.0.70.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| heymrunheym | Affected
| Fixed in
|
AI-suggested
Upgrade heymrun heym to version 0.0.70 or later, where this SSRF vulnerability is patched. No other mitigation is required as the vendor has provided an official fix.
Description
A Server-Side Request Forgery (SSRF) vulnerability exists in heymrun heym versions prior to 0.0.70. Authenticated users with the lowest role can access the POST /api/mcp/fetch-tools endpoint, which fetches attacker-supplied URLs without proper validation or allowlisting. The vulnerability allows attackers to control outbound request headers and gain a semi-blind SSRF oracle via error reflection in HTTP 422 responses. This issue is fixed in version 0.0.70.