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.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-c7450bfed6 advisory.

    Update to upstream 2.5.3, fix CVE-2026-34986, CVE-2026-39388, CVE-2026-39396, CVE-2026-40264


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-41918b2b57 advisory.

    Update to upstream 2.5.3, fix CVE-2026-34986, CVE-2026-39388, CVE-2026-39396, CVE-2026-40264


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-c008e6a5da advisory.

    Update to upstream 2.5.3, fix CVE-2026-34986, CVE-2026-39388, CVE-2026-39396, CVE-2026-40264


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
311376	Fedora 44 : openbao (2026-c7450bfed6)	Nessus	Fedora Local Security Checks	low
311375	Fedora 43 : openbao (2026-41918b2b57)	Nessus	Fedora Local Security Checks	low
311365	Fedora 42 : openbao (2026-c008e6a5da)	Nessus	Fedora Local Security Checks	low

Detections

Analytics

CVE-2026-39396

medium

Tenable Plugins

low

low

low