{"id":"CVE-2026-35628","aliases":["EUVD-2026-21114","GHSA-r4c2-gq3j-7rpj","GHSA-vcx4-4qxg-mfp4"],"status":"published","title":"OpenClaw \u003c 2026.3.25 - Brute-Force Attack via Missing Telegram Webhook Rate Limiting","description":"OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook secrets through brute-force attacks.","severity":{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00298,"percentile":0.22692,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-307","CWE-521"],"published":"2026-03-27T22:37:35Z","modified":"2026-10-28T02:31:04Z","affected":[{"source":"ghsa","ecosystem":"npm","package":"openclaw","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2026.3.24"}]}]},{"source":"osv","ecosystem":"npm","package":"openclaw","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"2026.3.24"}]}]}],"products":[{"vendor":"openclaw","product":"openclaw"}],"references":[{"url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-vcx4-4qxg-mfp4","tags":["vendor-advisory","Vendor Advisory","advisory","web"]},{"url":"https://github.com/openclaw/openclaw/commit/c2c136ae9517ddd0789d742a0fdf4c10e8c729a7","tags":["patch","Patch","fix","web"]},{"url":"https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-telegram-webhook-rate-limiting","tags":["third-party-advisory","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35628","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-r4c2-gq3j-7rpj"},{"url":"https://github.com/advisories/GHSA-vcx4-4qxg-mfp4"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35628.json","tags":["advisory"]},{"url":"https://github.com/openclaw/openclaw","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-35628","title":"OpenClaw \u003c 2026.3.25 - Brute-Force Attack via Missing Telegram Webhook Rate Limiting","description":"OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook secrets through brute-force attacks.","status":"published","published":"2026-04-09T21:27:00.14Z","modified":"2026-06-23T16:15:52.241Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:20:05.15083Z"}],"euvd":[{"id":"EUVD-2026-21114","description":"OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook secrets through brute-force attacks.","status":"published","published":"2026-04-09T21:27:00Z","modified":"2026-06-23T16:15:52Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:20:31.896888Z"}],"ghsa":[{"id":"GHSA-r4c2-gq3j-7rpj","title":"Duplicate Advisory: OpenClaw: Telegram Webhook Missing Guess Rate Limiting Enables Brute-Force Guessing of Weak Webhook Secret","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-vcx4-4qxg-mfp4. This link is maintained to preserve external references.\n\n## Original Description\nOpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook secrets through brute-force attacks.","status":"withdrawn","published":"2026-04-10T00:30:30Z","modified":"2026-04-18T00:45:09Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:39:55.105822Z"},{"id":"GHSA-vcx4-4qxg-mfp4","title":"OpenClaw: Telegram Webhook Missing Guess Rate Limiting Enables Brute-Force Guessing of Weak Webhook Secret","description":"## Summary\n\nTelegram Webhook Missing Guess Rate Limiting Enables Brute-Force Guessing of Weak Webhook Secret\n\n## Affected Packages / Versions\n\n- Package: `openclaw`\n- Affected versions: `\u003c= 2026.3.24`\n- First patched version: `2026.3.25`\n- Latest published npm version at verification time: `2026.3.24`\n\n## Details\n\nTelegram webhook auth previously rejected bad secrets but did not throttle repeated guesses, allowing brute-force attempts against weak webhook secrets. Commit `c2c136ae9517ddd0789d742a0fdf4c10e8c729a7` adds repeated-guess throttling before auth failure responses.\n\nVerified vulnerable on tag `v2026.3.24` and fixed on `main` by commit `c2c136ae9517ddd0789d742a0fdf4c10e8c729a7`.\n\n## Fix Commit(s)\n\n- `c2c136ae9517ddd0789d742a0fdf4c10e8c729a7`\n\n## Release Process Note\n\n`2026.3.25` is the next planned OpenClaw release version in `package.json`. This advisory is being published ahead of that npm release so the draft is no longer blocked; once `2026.3.25` is published, the structured patched-version metadata will match the released artifact.","status":"published","published":"2026-03-27T22:37:35Z","modified":"2026-04-18T00:45:44Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-307","CWE-521"],"updated_at":"2026-11-02T14:39:55.105822Z"}],"nvd":[{"id":"CVE-2026-35628","description":"OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook secrets through brute-force attacks.","status":"published","published":"2026-04-09T22:16:31.423Z","modified":"2026-06-17T10:40:53.78Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:12:13.902911Z"}],"osv":[{"id":"CVE-2026-35628","title":"OpenClaw \u003c 2026.3.25 - Brute-Force Attack via Missing Telegram Webhook Rate Limiting","description":"OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook secrets through brute-force attacks.","status":"published","published":"2026-04-09T21:27:00.14Z","modified":"2026-10-28T02:31:04.118486664Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T15:45:02.673625Z"},{"id":"GHSA-r4c2-gq3j-7rpj","title":"Duplicate Advisory: OpenClaw: Telegram Webhook Missing Guess Rate Limiting Enables Brute-Force Guessing of Weak Webhook Secret","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-vcx4-4qxg-mfp4. This link is maintained to preserve external references.\n\n## Original Description\nOpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook secrets through brute-force attacks.","status":"withdrawn","published":"2026-04-10T00:30:30Z","modified":"2026-04-18T01:06:17.205038Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"},{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T15:46:55.480549Z"},{"id":"GHSA-vcx4-4qxg-mfp4","title":"OpenClaw: Telegram Webhook Missing Guess Rate Limiting Enables Brute-Force Guessing of Weak Webhook Secret","description":"## Summary\n\nTelegram Webhook Missing Guess Rate Limiting Enables Brute-Force Guessing of Weak Webhook Secret\n\n## Affected Packages / Versions\n\n- Package: `openclaw`\n- Affected versions: `\u003c= 2026.3.24`\n- First patched version: `2026.3.25`\n- Latest published npm version at verification time: `2026.3.24`\n\n## Details\n\nTelegram webhook auth previously rejected bad secrets but did not throttle repeated guesses, allowing brute-force attempts against weak webhook secrets. Commit `c2c136ae9517ddd0789d742a0fdf4c10e8c729a7` adds repeated-guess throttling before auth failure responses.\n\nVerified vulnerable on tag `v2026.3.24` and fixed on `main` by commit `c2c136ae9517ddd0789d742a0fdf4c10e8c729a7`.\n\n## Fix Commit(s)\n\n- `c2c136ae9517ddd0789d742a0fdf4c10e8c729a7`\n\n## Release Process Note\n\n`2026.3.25` is the next planned OpenClaw release version in `package.json`. This advisory is being published ahead of that npm release so the draft is no longer blocked; once `2026.3.25` is published, the structured patched-version metadata will match the released artifact.","status":"published","published":"2026-03-27T22:37:35Z","modified":"2026-04-18T01:11:29.259656Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"},{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-307","CWE-521"],"updated_at":"2026-11-02T15:46:56.981655Z"}]}}