Vulnerability in Openclaw
CVE-2026-28459
OpenClaw versions prior to 2026.2.12 fail to validate the sessionFile path parameter, allowing authenticated gateway clients to write transcript data to arbitrary locations on the host filesystem. Attackers can supply a sessionFile path outside the sessions directory to create files and append data repeatedly, potentially causing configuration corruption or denial of service.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.002
Affected products
- Openclaw — versions 0
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-64qx-vpxx-mvqf (vendor-advisory, Patch, Vendor Advisory)
- github.com/openclaw/openclaw/commit/4199f9889f0c307b77096a229b9e085b8d856c26 (Patch, patch)
- github.com/openclaw/openclaw/commit/25950bcbb8ba4d8cde002557f6e27c219ae4deda (Patch, patch)
- www.vulncheck.com/advisories/openclaw-arbitrary-file-write-via-untrusted-sessio… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-28459?
- CVE-2026-28459 is a high-severity vulnerability in Openclaw, classified under External Control of File Name or Path. CVSS score: 7.1/10. Published 2026-03-05.
- How severe is CVE-2026-28459?
- High severity. CVSS v3 base score is 7.1 out of 10.