SSRF in Tencent Weknora
CVE-2026-118376
WeKnora before 0.8.2 contains a server-side request forgery vulnerability in isRestrictedIP() that misclassifies NAT64-prefixed IPv6 addresses as public. Authenticated attackers can supply URLs resolving to NAT64 encodings of internal addresses via web_fetch or URL-based knowledge import to reach internal services or cloud metadata endpoints.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
Weakness classification (CWE)
References
- github.com/Tencent/WeKnora/issues/4092 (issue-tracking)
- github.com/Tencent/WeKnora/commit/ff818b681f10bc29edbc48fe35f00009dc276bfa (patch)
- github.com/Tencent/WeKnora/commit/d7ccd5ba517cc3968e6d5000a2ab0f4b51ef1dda (patch)
- github.com/Tencent/WeKnora/blob/3d5d8bfcdfeeea266b292b71cea616847af28d0f/intern… (technical-description)
- github.com/Tencent/WeKnora/releases/tag/v0.8.2 (release-notes)
- github.com/Tencent/WeKnora (product)
- www.vulncheck.com/advisories/weknora-before-0.8.2-ssrf-guard-bypass-via-nat64-i… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-118376?
- CVE-2026-118376 is a medium-severity vulnerability in Tencent Weknora, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.3/10. Published 2026-10-28.
- How severe is CVE-2026-118376?
- Medium severity. CVSS v3 base score is 5.3 out of 10.