# CVE-2026-51080: Proxmox libpve-storage-perl XML External Entity vulnerability

Source: https://junglewise.ai/threats/cve-2026-51080-proxmox-libpve-storage-perl-xml-external-entity-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-17. Updated: 2026-07-17  
License: CC BY 4.0 with a link back

CVE-2026-51080 · Severity: info · CVSS 0 · Published 2026-07-17

Proxmox storage libraries, which manage storage backends for virtual environments, contain a vulnerability in how they process XML data. An attacker could exploit this to access sensitive files on the host system or perform internal network scanning. This could lead to the exposure of private configuration data or unauthorized access to internal services.

Vendors: [Proxmox](https://junglewise.ai/threats/vendors/proxmox).

## Quick answers

**Is CVE-2026-51080 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-51080 being exploited in the wild.

**How severe is CVE-2026-51080?** Informational severity, with a CVSS score of 0, published 17 July 2026.

**Which products and versions are affected?** Proxmox Libpve-Storage-Perl 8.3.7; Proxmox Libpvestorage-Perl 9.1.1.

**Is there a fix for CVE-2026-51080?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-51080 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-51080?** Check whether you run Proxmox Libpve-Storage-Perl or Proxmox Libpvestorage-Perl at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An XML External Entity (XXE) vulnerability exists in libpvestorage-perl v9.1.1 and libpve-storage-perl v8.3.7. The vulnerability likely stems from insecure XML parsing configurations that allow the resolution of external entities. An attacker who can influence XML input processed by these storage libraries could potentially read arbitrary files from the host filesystem or conduct Server-Side Request Forgery (SSRF) attacks. While the advisory lists the severity as 'info', XXE vulnerabilities typically carry a higher risk profile depending on the privileges of the service running the Perl library.

## Affected products

- Proxmox libpvestorage-perl 9.1.1
- Proxmox libpve-storage-perl 8.3.7

## Timeline

- 2026-07-17: disclosed: CVE published to NVD

## References

- [https://forum.proxmox.com/threads/proxmox-virtual-environment-security-advisories.149331/post-849970](https://forum.proxmox.com/threads/proxmox-virtual-environment-security-advisories.149331/post-849970)