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High7.1Proxmox

High [CVE-2022-35507] response-header CRLF injection vulnerability in the Proxmox Virtual Environment (PVE) and Proxmox Mail Gateway (PMG) web…

This high-severity Proxmox advisory covers CVE-2022-35507 affecting Proxmox Virtual Environment, Proxmox Mail Gateway.

CVE-2022-35507 Published Dec 4, 2022Updated by vendor Jun 17, 2026
Affected products & platforms
ProxmoxVirtual Environment (VE)Mail Gateway (PMG)
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Summary

A response-header CRLF injection vulnerability in the Proxmox Virtual Environment (PVE) and Proxmox Mail Gateway (PMG) web interface allows a remote attacker to set cookies for a victim's browser that are longer than the server expects, causing a client-side DoS. This affects Chromium-based browsers because they allow injection of response headers with %0d.

This is fixed in pve-http-server 4.1-3.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • 4.1-3

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation

Upgrade to a fixed release: 4.1-3. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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