Staging Environment: Content and features may be unstable or change without notice.
Advisory details: gitlab / npm/openclaw/CVE-2026-28449
Advisory ID gitlab/npm/openclaw/CVE-2026-28449
Aliases CVE-2026-28449
GHSA-r9q5-c7qc-p26w
Summary OpenClaw's Nextcloud Talk webhook replay could trigger duplicate inbound processing When Nextcloud Talk webhook signing was valid, replayed requests could be accepted without durable replay suppression, allowing duplicate inbound processing after replay-window expiry or process restart.
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 (3)
CWE-294 Authentication Bypass by Capture-replay
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/openclaw/CVE-2026-28449.yml
Reference id Reference type URL
https://github.com/openclaw/openclaw
CVE-2026-28449 https://nvd.nist.gov/vuln/detail/CVE-2026-28449
d512163d686ad6741783e7119ddb3437f493dbbc Other https://github.com/openclaw/openclaw/commit/d512163d686ad6741783e7119ddb3437f493dbbc
GHSA-r9q5-c7qc-p26w https://github.com/advisories/GHSA-r9q5-c7qc-p26w
GHSA-r9q5-c7qc-p26w Advisory https://github.com/openclaw/openclaw/security/advisories/GHSA-r9q5-c7qc-p26w
openclaw-webhook-replay-attack-via-missing-durable-replay-suppression Advisory https://www.vulncheck.com/advisories/openclaw-webhook-replay-attack-via-missing-durable-replay-suppression
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:H/PR:N/UI:N/S:U/C:N/I:L/A:L Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/openclaw/CVE-2026-28449.yml
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-29T14:35:06Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/28xxx/CVE-2026-28449.json

Source Advisory: vulnrichment/CVE-2026-28449

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