{"id":"CVE-2026-28454","aliases":["GHSA-fhvm-j76f-qmjv"],"url":"https://o3.security/vulnerability/CVE-2026-28454","summary":"OpenClaw < 2026.2.2 - Authorization Bypass via Unauthenticated Telegram Webhook","details":"## Summary\n\nWhen Telegram webhook mode is enabled without a configured webhook secret, OpenClaw may accept unauthenticated HTTP POST requests at the Telegram webhook endpoint and trust attacker-controlled update JSON. This can allow forged Telegram updates that spoof `message.from.id` / `chat.id`, potentially bypassing sender allowlists and executing privileged bot commands.\n\n## Affected Packages / Versions\n\n- Package: `openclaw` (npm)\n- Affected: `<= 2026.1.30`\n- Patched: `>= 2026.2.1`\n\n## Impact\n\nAn attacker who can reach the webhook endpoint can forge Telegram updates and impersonate allowlisted/paired senders by spoofing fields in the webhook payload (for example `message.from.id`). Impact depends on enabled commands/tools and the deployment’s network exposure.\n\n## Mitigations / Workarounds\n\n- Configure a strong `channels.telegram.webhookSecret` and ensure your reverse proxy forwards the `X-Telegram-Bot-Api-Secret-Token` header unchanged.\n\n## Fix Commit(s)\n\n- ca92597e1f9593236ad86810b66633144b69314d (config validation: `webhookUrl` requires `webhookSecret`)\n\nDefense-in-depth / supporting fixes:\n\n- 5643a934799dc523ec2ef18c007e1aa2c386b670 (default webhook listener bind host to loopback)\n- 3cbcba10cf30c2ffb898f0d8c7dfb929f15f8930 (bound webhook request body size/time)\n- 633fe8b9c17f02fcc68ecdb5ec212a5ace932f09 (runtime guard: reject webhook startup when secret is missing/empty)\n\n## Release Process Note\n\n`patched_versions` is set to the first fixed release (`2026.2.1`).\n\nThanks @yueyueL for reporting.","published":"2026-03-05T21:59:31.848Z","modified":"2026-10-28T02:30:47.038406728Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"openclaw","fixedVersion":"2026.2.1"}],"fix":{"url":"https://github.com/openclaw/openclaw/commit/3cbcba10cf30c2ffb898f0d8c7dfb929f15f8930","label":"openclaw/openclaw@3cbcba1"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28454.json"},{"type":"ADVISORY","url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-fhvm-j76f-qmjv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28454"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openclaw-authorization-bypass-via-unauthenticated-telegram-webhook"},{"type":"FIX","url":"https://github.com/openclaw/openclaw/commit/3cbcba10cf30c2ffb898f0d8c7dfb929f15f8930"},{"type":"FIX","url":"https://github.com/openclaw/openclaw/commit/5643a934799dc523ec2ef18c007e1aa2c386b670"},{"type":"FIX","url":"https://github.com/openclaw/openclaw/commit/633fe8b9c17f02fcc68ecdb5ec212a5ace932f09"},{"type":"FIX","url":"https://github.com/openclaw/openclaw/commit/ca92597e1f9593236ad86810b66633144b69314d"},{"type":"PACKAGE","url":"https://github.com/openclaw/openclaw"},{"type":"WEB","url":"https://github.com/openclaw/openclaw/releases/tag/v2026.2.1"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:47.038406728Z"}}