Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-9528-x887-j2fp
Advisory ID github_osv/GHSA-9528-x887-j2fp
Aliases CVE-2026-33580
Summary OpenClaw's Nextcloud Talk webhook missing rate limiting on shared secret authentication ## Summary Nextcloud Talk webhook signature failures were not throttled even though the integration relies on an operator-configured shared secret that may be weak. ## Impact An attacker who could reach the webhook endpoint could brute-force weak secrets online and then forge inbound webhook events. ## Affected Component `extensions/nextcloud-talk/src/monitor.ts` ## Fixed Versions - Affected: `<= 2026.3.24` - Patched: `>= 2026.3.28` - Latest stable `2026.3.28` contains the fix. ## Fix Fixed by commit `e403decb6e` (`nextcloud-talk: throttle repeated webhook auth failures`). OpenClaw thanks @AntAISecurityLab for reporting.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-307 Improper Restriction of Excessive Authentication Attempts
System Score Found at
generic_textual MODERATE
Reference id Reference type URL
https://github.com/openclaw/openclaw
https://github.com/openclaw/openclaw/releases/tag/v2026.3.28
CVE-2026-33580 https://nvd.nist.gov/vuln/detail/CVE-2026-33580
e403decb6e20091b5402780a7ccd2085f98aa3cd Other https://github.com/openclaw/openclaw/commit/e403decb6e20091b5402780a7ccd2085f98aa3cd
GHSA-9528-x887-j2fp Advisory https://github.com/openclaw/openclaw/security/advisories/GHSA-9528-x887-j2fp
openclaw-brute-force-attack-via-missing-rate-limiting-on-webhook-shared-secret-authentication Advisory https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-rate-limiting-on-webhook-shared-secret-authentication
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
There are no known vectors.

Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2026-03-31T17:18:43Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/33xxx/CVE-2026-33580.json

Source Advisory: vulnrichment/CVE-2026-33580

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'yes'},
 {'Technical Impact': 'total'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]