by Kastro
Paper/Archive/CVE-2026-28454

CVE-2026-28454

OpenClaw OpenClaw — OpenClaw < 2026.2.2 - Authorization Bypass via Unauthenticated Telegram Webhook

EPSS 0.3%CVSS 9.8
critical.is priorityof 100
34
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 22.3.223 × 204.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
OpenClaw< 2026.2.22026.2.2CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)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
VulnCheck (CNA)7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

advisorygithub.com/openclaw/openclaw/security/advisories/GHSA-fhvm-j76f-qmjvpatchgithub.com/openclaw/openclaw/commit/ca92597e1f9593236ad86810b66633144b69314dpatchgithub.com/openclaw/openclaw/commit/5643a934799dc523ec2ef18c007e1aa2c386b670patchgithub.com/openclaw/openclaw/commit/3cbcba10cf30c2ffb898f0d8c7dfb929f15f8930patchgithub.com/openclaw/openclaw/commit/633fe8b9c17f02fcc68ecdb5ec212a5ace932f09writeupvulncheck.com/advisories/openclaw-authorization-bypass-via-unauthenticated-telegram-webhook