PT-2026-31762 · Openclaw · Openclaw

Seokjun Ryu · Published 2026-03-26 · Updated 2026-04-10 · CVE-2026-35626

Positive Technologies (AI Summary)

CVSS v4.0

6.6

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

Name of the Vulnerable Software and Affected Versions OpenClaw versions prior to 2026.3.22

Description OpenClaw contains an unauthenticated resource exhaustion issue in how it handles voice call webhooks. The system buffers request bodies before verifying the provider's signature, allowing attackers to send large or malicious requests to deplete server resources without authentication, effectively bypassing signature validation.

Recommendations Update to version 2026.3.22 or later.

Fix

Resource Exhaustion

Weakness Enumeration

CWE-405

CWE-400

Related Identifiers

CVE-2026-35626

GHSA-36CP-MH65-X882

GHSA-RM59-992W-X2MV

Affected Products

Openclaw

References · 10

• https://github.com/openclaw/openclaw/commit/651dc7450b68a5396a009db78ef9382633707ead · Patch
• https://github.com/openclaw/openclaw/security/advisories/GHSA-rm59-992w-x2mv · Vendor Advisory
• https://github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87 · Patch
• https://osv.dev/vulnerability/GHSA-rm59-992w-x2mv · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-35626 · Security Note
• https://osv.dev/vulnerability/GHSA-36cp-mh65-x882 · Vendor Advisory
• https://github.com/openclaw/openclaw · Note
• https://twitter.com/CVEnew/status/2042387955067900132 · Twitter Post
• https://twitter.com/infoflowcloud/status/2042390131072553113 · Twitter Post
• https://vulncheck.com/advisories/openclaw-unauthenticated-resource-exhaustion-via-voice-call-webhook · Note