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Details of issue NIXPKGS-2026-0049

NIXPKGS-2026-0049
published 6 months, 1 week ago
Permalink CVE-2026-23845
5.8 MEDIUM
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Changed (C)
  • Confidentiality (C): Low (L)
  • Integrity (I): None (N)
  • Availability (A): None (N)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): Low (L)
  • Modified Scope (MS): Changed (C)
  • Modified Integrity (MI): None (N)
  • Modified Availability (MA): None (N)
updated 6 months, 1 week ago by @LeSuisse Activity log
  • Created suggestion 6 months, 1 week ago
  • @LeSuisse accepted 6 months, 1 week ago
  • @LeSuisse published on GitHub 6 months, 1 week ago
Mailpit Vulnerable to Server-Side Request Forgery (SSRF) via HTML Check API

Mailpit is an email testing tool and API for developers. Versions prior to 1.28.3 are vulnerable to Server-Side Request Forgery (SSRF) via HTML Check CSS Download. The HTML Check feature (`/api/v1/message/{ID}/html-check`) is designed to analyze HTML emails for compatibility. During this process, the `inlineRemoteCSS()` function automatically downloads CSS files from external `<link rel="stylesheet" href="...">` tags to inline them for testing. Version 1.28.3 fixes the issue.

Affected products

mailpit
  • ==< 1.28.3

Matching in nixpkgs

pkgs.mailpit

Email and SMTP testing tool with API for developers

Package maintainers

Upstream advisory: https://github.com/axllent/mailpit/security/advisories/GHSA-6jxm-fv7w-rw5j
Upstream patch: https://github.com/axllent/mailpit/commit/1679a0aba592ebc8487a996d37fea8318c984dfe