Go/github.com/portainer/portainer CVE-2026-55761: medium 5.9, EPSS 0.49%

Portainer has Unauthenticated Restore Endpoint that Allows Admin Takeover on Uninitialized Instances in github.com/portainer/portainer

Action: No fix published. Pin and monitor.

Affected

Fixed versions

No fixed version in the source.

Sources

• osv: GO-2026-6324
• nvd: CVE-2026-55761
• https://github.com/portainer/portainer/security/advisories/GHSA-x626-fcwx-f5pc
• https://github.com/portainer/portainer/commit/49f19107cf9a3540cbe406c9eb7f24390e1af02b
• https://github.com/portainer/portainer/commit/d2b56efcb4e43c4168bb6688eee9f6bf22867312
• https://github.com/portainer/portainer/issues/2770
• https://github.com/portainer/portainer/releases/tag/2.39.4
• https://github.com/portainer/portainer/releases/tag/2.43.0

CVE-2026-55761 · published 2026-09-02T18:37:27Z · modified 2026-09-02T19:45:12.634762853Z · JSON