CVE-2026-35618 | OpenClaw up to 2026.3.22 Signature Verification authentication replay (GHSA-cg6c-q2hx-69h7)

VDB-356777 · CVE-2026-35618 · GHSA-CG6C-Q2HX-69H7 OPENCLAW UP TO 2026.3.22 SIGNATURE VERIFICATION AUTHENTICATION REPLAY HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.9 $0-$5k 1.21+ Summaryinfo A vulnerability, which was classified as critical, has been found in OpenClaw up to 2026.3.22. This vulnerability affects unknown code of the component Signature Verification. The manipulation leads to authentication replay. This vulnerability is uniquely identified as CVE-2026-35618. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component. Detailsinfo A vulnerability was found in OpenClaw up to 2026.3.22. It has been rated as critical. This issue affects an unknown functionality of the component Signature Verification. The manipulation with an unknown input leads to a authentication replay vulnerability. Using CWE to declare the problem leads to CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). Impacted is confidentiality, integrity, and availability. The summary by CVE is: OpenClaw before 2026.3.23 contains a replay identity vulnerability in Plivo V2 signature verification that allows attackers to bypass replay protection by modifying query parameters. The verification path derives replay keys from the full URL including query strings instead of the canonicalized base URL, enabling attackers to mint new verified request keys through unsigned query-only changes to signed requests. The weakness was disclosed by KeenSecurityLab as GHSA-cg6c-q2hx-69h7. The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-35618 since 04/04/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1040 for this issue. Upgrading to version 2026.3.23 eliminates this vulnerability. Applying the patch 630f1479c44f78484dfa21bb407cbe6f171dac87 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. Productinfo Type Artificial Intelligence Software Name OpenClaw Version 2026.3.0 2026.3.1 2026.3.2 2026.3.3 2026.3.4 2026.3.5 2026.3.6 2026.3.7 2026.3.8 2026.3.9 2026.3.10 2026.3.11 2026.3.12 2026.3.13 2026.3.14 2026.3.15 2026.3.16 2026.3.17 2026.3.18 2026.3.19 2026.3.20 2026.3.21 2026.3.22 License open-source Website Product: https://github.com/openclaw/openclaw/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 6.0 VulDB Meta Temp Score: 5.9 VulDB Base Score: 5.6 VulDB Temp Score: 5.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.5 CNA Vector (VulnCheck): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Authentication replay CWE: CWE-294 / CWE-287 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: OpenClaw 2026.3.23 Patch: 630f1479c44f78484dfa21bb407cbe6f171dac87 Timelineinfo 04/04/2026 CVE reserved 04/10/2026 +6 days Advisory disclosed 04/10/2026 +0 days VulDB entry created 04/10/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-cg6c-q2hx-69h7 Researcher: KeenSecurityLab Status: Confirmed CVE: CVE-2026-35618 (🔒) GCVE (CVE): GCVE-0-2026-35618 GCVE (VulDB): GCVE-100-356777 Entryinfo Created: 04/10/2026 06:54 Changes: 04/10/2026 06:54 (80) Complete: 🔍 Cache ID: 99:916:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸