CVE-2022-35507

HIGH 7.1CVE-2022-35507 · Published 04/12/2022 · updated 17/06/2026

In short

CVE-2022-35507 is a HIGH (CVSS 7.1) vulnerability affecting pve http server (proxmox).
Chance of exploitation in the next 30 days (EPSS): 1.5%, higher than 73.5% of all vulnerabilities.
Fix: update to 4.1-3 or later.

Package	Affected versions	Patched versions
pve http server proxmox	`< 4.1-3`	`4.1-3`

Description

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.

References

git.proxmox.com
starlabs.sg/blog/2022/12-multiple-vulnerabilites-in-proxmox-ve--proxmox-mail-gateway · Exploit

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