Portainer HTTP Headers May Leak to Malicious Container Registries

Description

Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. Prior to STS version 2.31.0 and LTS version 2.27.7, if a Portainer administrator can be convinced to register a malicious container registry, or an existing container registry can be taken over, HTTP Headers (including registry authentication credentials or Portainer session tokens) may be leaked to that registry. This issue has been patched in STS version 2.31.0 and LTS version 2.27.7.

Scores

EPSS (exploitation in 30 days)

0.40% · top 66% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.

Weakness

• CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (opens in a new tab)All about CWE-200 and its CVEs

Affected products

• portainer · portainer

  • affected < 2.27.7
  • affected < 2.31.0

References (3)

• https://github.com/portainer/portainer/security/advisories/GHSA-h5jw-8c32-xfv6 (opens in a new tab)x_refsource_CONFIRM
• https://github.com/portainer/portainer/commit/384cb53c64af78af8e1ac7ef5b0f91bad530e989 (opens in a new tab)x_refsource_MISC
• https://github.com/portainer/portainer/commit/b767dcb27ed253b423facd2e04ef971985950fd3 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2025-49593](https://trackcve.app/badge/CVE-2025-49593.svg)](https://trackcve.app/cve/CVE-2025-49593)

Record last updated 18 Jun 2025, 13:41 UTC.