CVE-2026-28476 | THREATINT

Description

OpenClaw versions prior to 2026.2.14 contain a server-side request forgery vulnerability in the optional Tlon Urbit extension that accepts user-provided base URLs for authentication without proper validation. Attackers who can influence the configured Urbit URL can induce the gateway to make HTTP requests to arbitrary hosts including internal addresses.

PUBLISHED Reserved 2026-02-27 | Published 2026-03-05 | Updated 2026-03-06 | Assigner VulnCheck

MEDIUM: 6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

HIGH: 8.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

Problem types

Server-Side Request Forgery (SSRF)

Product status

Default status

unaffected

Any version before 2026.2.14

affected

Credits

Peyton Kennedy (@p80n-sec) reporter

References

github.com/...enclaw/security/advisories/GHSA-pg2v-8xwh-qhcc (GitHub Security Advisory (GHSA-pg2v-8xwh-qhcc)) vendor-advisory

github.com/...ommit/bfa7d21e997baa8e3437657d59b1e296815cc1b1 (Patch Commit) patch

www.vulncheck.com/...orgery-in-tlon-extension-authentication (VulnCheck Advisory: OpenClaw < 2026.2.14 - Server-Side Request Forgery in Tlon Extension Authentication) third-party-advisory

cve.org (CVE-2026-28476)

nvd.nist.gov (CVE-2026-28476)

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