DevGuard has an unauthenticated identity assertion via `X-Admin-Token` header

緊急 9.3CVE-2026-42300 · GHSA-2g9v-7mr5-fgjg · GO-2026-4988 · 12/05/2026 公開 · 26/10/2026 更新

要点

CVE-2026-42300 は github.com/l3montree-dev/devguard に影響する深刻度「緊急」 (CVSS 9.3) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.26%（全脆弱性の 17.4% より高い）。
対処：1.2.2 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
github.com/l3montree-dev/devguard Go	`< 1.2.2`	`1.2.2`

概要

Impact

The SessionMiddleware accepts a client-supplied X-Admin-Token HTTP request header and uses its raw string value as the authenticated userID when no Kratos session cookie is present. An unauthenticated attacker who knows or can guess a target user's Kratos identity UUID can issue requests as that user. Where the target user is an organisation admin or owner, this gives the attacker full control over that organisation's DevGuard resources.

Patches

The release v1.2.2 patches this issue. Update your DevGuard API Instances to this version.

Workarounds

Configure a reverse proxy to strip the X-Admin-Token header before sending requests to the DevGuard API.

Resources

Fixed commit: https://github.com/l3montree-dev/devguard/commit/6f38310bf93b2a63df3055038f4da82b1f4e6d9a

NVD の説明

DevGuard provides vulnerability management for the full software supply chain. Prior to 1.2.2, the SessionMiddleware accepts a client-supplied X-Admin-Token HTTP request header and uses its raw string value as the authenticated userID when no Kratos session cookie is present. An unauthenticated attacker who knows or can guess a target user's Kratos identity UUID can issue requests as that user. Where the target user is an organisation admin or owner, this gives the attacker full control over that organisation's DevGuard resources. This vulnerability is fixed in 1.2.2.