Upstream information

CVE-2026-39396 at MITRE

Description

OpenBao is an open source identity-based secrets management system. Prior to version 2.5.3, `ExtractPluginFromImage()` in OpenBao's OCI plugin downloader extracts a plugin binary from a container image by streaming decompressed tar data via `io.Copy` with no upper bound on the number of bytes written. An attacker who controls or compromises the OCI registry referenced in the victim's configuration can serve a crafted image containing a decompression bomb that decompresses to an arbitrarily large file. The SHA256 integrity check occurs after the full file is written to disk, meaning the hash mismatch is detected only after the damage (disk exhaustion) has already occurred. This allow the attacker to replace **legit plugin image** with no need to change its signature. Version 2.5.3 contains a patch.

SUSE information

Overall state of this security issue: Analysis

This issue is currently not rated by SUSE as it is not affecting the SUSE Enterprise products.

CVSS v3 Scores
CVSS detail CNA (GitHub)
Base Score 3.1
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact Low
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1262420 [NEW]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Tumbleweed
  • openbao >= 2.5.3-1.1
  • openbao-agent >= 2.5.3-1.1
  • openbao-cassandra-database-plugin >= 2.5.3-1.1
  • openbao-influxdb-database-plugin >= 2.5.3-1.1
  • openbao-mysql-database-plugin >= 2.5.3-1.1
  • openbao-mysql-legacy-database-plugin >= 2.5.3-1.1
  • openbao-postgresql-database-plugin >= 2.5.3-1.1
  • openbao-server >= 2.5.3-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-10594

SUSE Timeline for this CVE

CVE page created: Tue Apr 21 04:00:21 2026
CVE page last modified: Wed Apr 22 12:58:36 2026