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CVE-2026-42420
4.3 MEDIUM
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): None (N)
- Integrity (I): None (N)
- Availability (A): Low (L)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): None (N)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): None (N)
- Modified Availability (MA): Low (L)
Activity log
- Created suggestion
OpenClaw < 2026.4.8 - Improper Base64 Decoding Size Validation
OpenClaw before 2026.4.8 contains improper input validation in base64 decode paths that allocate memory before enforcing decoded-size limits. Attackers can exploit multiple code paths to cause memory exhaustion or denial of service through crafted base64-encoded input.
References
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GitHub Security Advisory (GHSA-ccx3-fw7q-rr2r) vendor-advisory
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Patch Commit patch
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VulnCheck Advisory: OpenClaw < 2026.4.8 - Improper Base64 Decoding Size Validation third-party-advisory
Affected products
OpenClaw
- ==2026.4.8
- <2026.4.8
Package maintainers
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@mkg20001 Maciej Krüger <mkg20001+nix@gmail.com>
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@chrisportela Chris Portela <chris@chrisportela.com>