CVE-2026-42438 | THREATINT

Description

OpenClaw versions 2026.4.9 before 2026.4.10 contain a sender policy bypass vulnerability in the outbound host-media attachment read helper that allows unauthorized local file disclosure. Attackers with denied read access via toolsBySender or group policy can trigger host-media attachment loading to bypass sender and group-scoped authorization boundaries and retrieve readable local files through the outbound media path.

PUBLISHED Reserved 2026-04-27 | Published 2026-05-05 | Updated 2026-05-05 | Assigner VulnCheck

MEDIUM: 4.9CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N

HIGH: 7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Problem types

CWE-863: Incorrect Authorization

Product status

Default status

unaffected

2026.4.9 (semver) before 2026.4.10

affected

2026.4.10 (semver)

unaffected

Credits

Akiyama Mio (@Telecaster2147) reporter

References

github.com/...enclaw/security/advisories/GHSA-jhpv-5j76-m56h (GitHub Security Advisory (GHSA-jhpv-5j76-m56h)) vendor-advisory

github.com/...ommit/c949af9fabf3873b5b7c484090cb5f5ab6049a98 (Patch Commit) patch

www.vulncheck.com/...y-bypass-in-host-media-attachment-reads (VulnCheck Advisory: OpenClaw 2026.4.9 < 2026.4.10 - Sender Policy Bypass in Host Media Attachment Reads) third-party-advisory

cve.org (CVE-2026-42438)

nvd.nist.gov (CVE-2026-42438)

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