CVE-2026-28449

MEDIUM EPSS 18.2%
Published Mar 19, 20263mo ago · Modified Jun 17, 20262w ago
6.3 CVSS 4.0
Medium
Find Similar
Published Mar 19, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

Description

OpenClaw versions prior to 2026.2.25 lack durable replay state for Nextcloud Talk webhook events, allowing valid signed webhook requests to be replayed without suppression. Attackers can capture and replay previously valid signed webhook requests to trigger duplicate inbound message processing and cause integrity or availability issues.

CVSS Details

Base Score
6.3
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
18.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-294

Affected Products 1

VendorProductVersionRange
openclawopenclaw* <2026.2.25

References 3

  • github.com https://github.com/openclaw/openclaw/commit/d512163d686ad6741783e7119ddb3437f493dbbc
    Patch
  • github.com https://github.com/openclaw/openclaw/security/advisories/GHSA-r9q5-c7qc-p26w
    MitigationVendor Advisory
  • vulncheck.com https://www.vulncheck.com/advisories/openclaw-webhook-replay-attack-via-missing-durable-replay-suppression
    Third Party Advisory

Remediation

  • github.com https://github.com/openclaw/openclaw/commit/d512163d686ad6741783e7119ddb3437f493dbbc
    Patch