---
id: CVE-2026-118376
title: WeKnora before 0.8.2 SSRF Guard Bypass via NAT64 IPv6 Addresses
summary: >-
  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 ad…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-918
vendor: Tencent
product: WeKnora
affected:
  - WeKnora >= 0.2.11 < 0.8.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-28T14:35:39.639974Z'
published: '2026-10-28'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T16:11:20.194Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-118376'
references:
  - url: 'https://github.com/Tencent/WeKnora/issues/4092'
  - url: >-
      https://github.com/Tencent/WeKnora/commit/ff818b681f10bc29edbc48fe35f00009dc276bfa
  - url: >-
      https://github.com/Tencent/WeKnora/commit/d7ccd5ba517cc3968e6d5000a2ab0f4b51ef1dda
  - url: >-
      https://github.com/Tencent/WeKnora/blob/3d5d8bfcdfeeea266b292b71cea616847af28d0f/internal/utils/security.go#L267-L327
  - url: 'https://github.com/Tencent/WeKnora/releases/tag/v0.8.2'
    label: WeKnora v0.8.2 Release Notes
  - url: 'https://github.com/Tencent/WeKnora'
  - url: >-
      https://www.vulncheck.com/advisories/weknora-before-0.8.2-ssrf-guard-bypass-via-nat64-ipv6-addresses
    label: >-
      VulnCheck Advisory: WeKnora before 0.8.2 SSRF Guard Bypass via NAT64 IPv6
      Addresses
tags:
  - cve.org
epss: 0.00273
epssPercentile: 0.19654
ingestedAt: '2026-10-28T03:02:57.621Z'
---

## Overview

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.

## Affected

- `WeKnora >= 0.2.11 < 0.8.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.