CVE-2026-43532
Openclaw 2026.4.7 – 2026.4.10
Raw vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
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 17th 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 map to SI-10 (Information Input Validation) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
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 Data
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 Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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- 2 hardening rules · 1 OS baseline
V3.5.2V4.4.2V16.2.5
Mitigating Controls (NIST 800-53 r5) AI
SI-10 requires validity checks on inputs, which structurally replaces incomplete deny-lists with complete allow-list or sanitization logic.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require complete, positive input validation instead of incomplete denylists.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing can discover missing input checks, but does not prevent the weakness during development.
Application security requirements can mandate complete input validation rules, but the control itself does not prescribe how to build those rules.
Secure architecture principles include robust input validation design, yet the control is broader than this single weakness.
Secure coding standards directly require exhaustive allow-lists or complete deny-lists for inputs, addressing the root cause of incomplete disallowed-input lists.