Home

Description

OpenClaw versions prior to 2026.2.14 contain a denial of service vulnerability in the fetchWithGuard function that allocates entire response payloads in memory before enforcing maxBytes limits. Remote attackers can trigger memory exhaustion by serving oversized responses without content-length headers to cause availability loss.

PUBLISHED Reserved 2026-03-04 | Published 2026-03-05 | Updated 2026-03-05 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Allocation of Resources Without Limits or Throttling

Product status

Default status
unaffected

Any version before 2026.2.14
affected

Credits

Vincent Koc (@vincentkoc) reporter

References

github.com/...enclaw/security/advisories/GHSA-j27p-hq53-9wgc (GitHub Security Advisory (GHSA-j27p-hq53-9wgc)) vendor-advisory

github.com/...ommit/00a08908892d1743d1fc52e5cbd9499dd5da2fe0 (Patch Commit) patch

www.vulncheck.com/...ce-via-unbounded-url-backed-media-fetch (VulnCheck Advisory: OpenClaw < 2026.2.14 - Denial of Service via Unbounded URL-backed Media Fetch) third-party-advisory

cve.org (CVE-2026-29609)

nvd.nist.gov (CVE-2026-29609)

Download JSON