VulnerabilityAnalyzed
CVE-2026-33580
OpenClaw before 2026.3.28 contains a missing rate limiting vulnerability in the Nextcloud Talk webhook authentication that allows attackers to brute-force weak shared secrets.
MEDIUM 6.3EPSS 0.36%
Does this matter?
Lower severity and a low EPSS score (0.36%). Track it; it rarely justifies an emergency change on its own.
Description
OpenClaw before 2026.3.28 contains a missing rate limiting vulnerability in the Nextcloud Talk webhook authentication that allows attackers to brute-force weak shared secrets. Attackers who can reach the webhook endpoint can exploit this to forge inbound webhook events by repeatedly attempting authentication without throttling.
- CVSS 4.0
- 6.3 MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/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/M
- EPSS
- 0.36% probability · 30th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-307
- Affected
- openclaw/openclaw
- Source
- disclosure@vulncheck.com
References
- https://github.com/openclaw/openclaw/commit/e403decb6e20091b5402780a7ccd2085f98aa3cdPatch
- https://github.com/openclaw/openclaw/security/advisories/GHSA-9528-x887-j2fpVendor Advisory
- https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-rate-limiting-on-webhook-shared-secret-authenticationThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.