What’s Vulnerable › Vulnerabilities

CVE-2026-29609: OpenClaw < 2026.2.14 - Denial of Service via Unbounded URL-backed Media Fetch

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-05 · updated 2026-06-17
• Weakness: CWE-770

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.

Affected products

• OpenClaw: before 2026.2.14 — fixed in 2026.2.14

How to fix

Upgrade to a fixed version: OpenClaw 2026.2.14. Check the vendor advisory for mitigations.

References

• https://github.com/openclaw/openclaw/commit/00a08908892d1743d1fc52e5cbd9499dd5da2fe0
• https://github.com/openclaw/openclaw/security/advisories/GHSA-j27p-hq53-9wgc
• https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-url-backed-media-fetch
• https://github.com/openclaw/openclaw/security/advisories/GHSA-j27p-hq53-9wgc

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