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Advisory details: vulnrichment / CVE-2026-33580
Advisory ID vulnrichment/CVE-2026-33580
Aliases
Summary 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.
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
cvssv3.1 6.5
cvssv4 6.3
ssvc Track
Reference id Reference type URL
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.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at None
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N Found at None
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2026-03-31T17:18:43Z/ Found at None

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'}]