CVE-2026-28454 | THREATINT

Description

OpenClaw versions prior to 2026.2.2 fail to validate webhook secrets in Telegram webhook mode (must be enabled), allowing unauthenticated HTTP POST requests to the webhook endpoint that trust attacker-controlled JSON payloads. Remote attackers can forge Telegram updates by spoofing message.from.id and chat.id fields to bypass sender allowlists and execute privileged bot commands.

PUBLISHED Reserved 2026-02-27 | Published 2026-03-05 | Updated 2026-03-09 | Assigner VulnCheck

HIGH: 8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Problem types

Insufficient Verification of Data Authenticity

Product status

Default status

unaffected

Any version before 2026.2.2

affected

Credits

Petr Simecek (@simecek) reporter

Stanislav Fort, Aisle Research, www.aisle.com analyst

References

github.com/...enclaw/security/advisories/GHSA-fhvm-j76f-qmjv (GitHub Security Advisory (GHSA-fhvm-j76f-qmjv)) vendor-advisory

github.com/...ommit/ca92597e1f9593236ad86810b66633144b69314d (Patch Commit) patch

github.com/...ommit/5643a934799dc523ec2ef18c007e1aa2c386b670 (Hardening Commit #1) patch

github.com/...ommit/3cbcba10cf30c2ffb898f0d8c7dfb929f15f8930 (Hardening Commit #2) patch

github.com/...ommit/633fe8b9c17f02fcc68ecdb5ec212a5ace932f09 (Hardening Commit #3) patch

www.vulncheck.com/...ss-via-unauthenticated-telegram-webhook (VulnCheck Advisory: OpenClaw < 2026.2.2 - Authorization Bypass via Unauthenticated Telegram Webhook) third-party-advisory

cve.org (CVE-2026-28454)

nvd.nist.gov (CVE-2026-28454)

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