CVE-2026-43532
Published: 05 May 2026
Summary
CVE-2026-43532 is a medium-severity Incomplete List of Disallowed Inputs (CWE-184) vulnerability in Openclaw Openclaw. Its CVSS base score is 4.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 16.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-4 (Information Flow Enforcement) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2026-43532 is a vulnerability in OpenClaw versions 2026.4.7 before 2026.4.10, affecting the sandbox media processing component. It stems from a failure to normalize Discord event cover image parameters, enabling attackers to bypass media normalization and inject host-local media references into channel action paths that expect normalized media. The issue carries a CVSS v3.1 base score of 7.7 (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N) and is classified under CWE-184.
Attackers with low privileges (PR:L) can exploit this over the network (AV:N) with low attack complexity and no user interaction required. Successful exploitation allows injection of host-local media references, resulting in high confidentiality impact (C:H) by potentially exposing sensitive local media through manipulated channel action paths.
Advisories recommend upgrading to OpenClaw version 2026.4.10, where the fix is implemented via commit 979c6f09d6fad96596feb91c905934be7e0b4f15. Additional details are provided in the GitHub security advisory at https://github.com/openclaw/openclaw/security/advisories/GHSA-c9h3-5p7r-mrjh and the VulnCheck advisory at https://www.vulncheck.com/advisories/openclaw-sandbox-media-normalization-bypass-via-discord-event-cover-image.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-27275
Vulnerability details
OpenClaw versions 2026.4.7 before 2026.4.10 fail to normalize Discord event cover image parameters in sandbox media processing. Attackers can bypass media normalization to inject host-local media references into channel action paths expecting normalized media.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Network-accessible sandbox bypass in media normalization enables remote exploitation of the application (T1190) to directly access and expose host-local files/media (T1005).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly mandates validation and normalization of Discord event cover image parameters to block injection of host-local media references in sandbox processing.
Requires timely flaw remediation via patching to OpenClaw 2026.4.10, comprehensively addressing the normalization bypass vulnerability.
Enforces information flow controls to restrict unnormalized media references from accessing host-local resources through channel action paths.