Public proof of conceptFix available

CVE-2022-45059

Q: Is CVE-2022-45059 actively exploited?

Active exploitation of CVE-2022-45059 has not been confirmed. Its EPSS score was 1.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2022-45059?

CVE-2022-45059 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

A public proof of concept exists; no exploitation attested.

Published2022-11-09
WeaknessCWE-444

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered in Varnish Cache 7.x before 7.1.2 and 7.2.x before 7.2.1. A request smuggling attack can be performed on Varnish Cache servers by requesting that certain headers are made hop-by-hop, preventing the Varnish Cache servers from forwarding critical headers to the backend.

Timeline

dates in UTC

2022-11-0906:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-45059?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-45059?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Fedoraproject fedora

Branch	Affected	Fixed in	Source
35.x	= 35	no fix published	NVD
36.x	= 36	no fix published	NVD
37.x	= 37	no fix published	NVD

Varnish cache project varnish cache

Branch	Affected	Fixed in	Source
7.2	≥ 7.2.0, < 7.2.1	7.2.1	OSV
7.x	≥ 7.0.0, < 7.1.2	7.1.2	NVD · OSV
7.2	= 7.2.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

varnish-cache.orgMitigation · Vendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedmartinvks/CVE-2022-45059-demo

Sources

CISA-ADPSSVC decisionnone2025-05-01
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.52025-05-01
NVDCVSS 3.17.5read 2026-10-23
CISA-ADPweakness (CWE)CWE-4442025-05-01
NVDweakness (CWE)CWE-444read 2026-10-23
FIRST EPSSEPSS score1.5 %2026-10-22
PoC-in-GitHubproof of concept1read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published: 2022-11-09
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2022-45059?

Is CVE-2022-45059 actively exploited?

Active exploitation of CVE-2022-45059 has not been confirmed. Its EPSS score was 1.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-45059?

CVE-2022-45059 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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