CVE-2026-28475 json
OpenClaw < 2026.2.13 - Timing Attack via Hook Token Comparison
published 2026-03-02 8 mo ago modified 2026-06-17 4 mo ago also GHSA-47q7-97xp-m272 , EUVD-2026-9921
- cvss
- 4.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 26%
- public exploits
- 0
- none known
Summary
OpenClaw versions prior to 2026.2.13 use non-constant-time string comparison for hook token validation, allowing attackers to infer tokens through timing measurements. Remote attackers with network access to the hooks endpoint can exploit timing side-channels across multiple requests to gradually recover the authentication token.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.3 | 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 |
| CNA | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| CNA | 4.0 | 6.3 | 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 |
| NVD | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | openclaw | <2026.2.13 |
2026.2.13 |
Affected products
- OpenClaw OpenClaw
Classification
- Weakness
-
- CWE-208 Observable Timing Discrepancy
References
-
github.com
/openclaw/openclaw/commit/113ebfd6a23c4beb8a575d48f7482593254506ec
patch, web
-
github.com
/openclaw/openclaw/security/advisories/GHSA-47q7-97xp-m272
vendor-advisory, web
-
vulncheck.com
/advisories/openclaw-timing-attack-via-hook-token-comparison
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-28475
advisory
-
github.com
/openclaw/openclaw
package
Sources
- CVE List CVE-2026-28475
- GitHub Advisory GHSA-47q7-97xp-m272
- NVD CVE-2026-28475
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