CVE-2026-118376

medium

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.

References

https://www.vulncheck.com/advisories/weknora-before-0.8.2-ssrf-guard-bypass-via-nat64-ipv6-addresses

https://github.com/Tencent/WeKnora/releases/tag/v0.8.2

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

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-111552

Details

Source: Mitre, NVD

Published: 2026-10-28

Updated: 2026-10-28

Risk Information

CVSS v2

Base Score: 4.9

Vector: CVSS2#AV:N/AC:H/Au:S/C:C/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 5.3

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Severity: Medium

CVSS v4

Base Score: 6

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

Severity: Medium