CVE-2022-45060Network attack vector

Backend request forgery via invalid HTTP/2 pseudo-headers

Published Nov 9, 2022 · Updated May 1, 2025

HTTP request forgery in affected Varnish Cache releases allows remote attackers to forge requests to backend servers over HTTP/2. HTTP/2 pseudo-header values populate req.url and req.method without rejection of spaces, tabs, or empty values before HTTP/1 serialization. HTTP/2 must be enabled, and impact depends on a backend that interprets the malformed request in an exploitable way.

CVSS severity7.5
High
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP request forgery in affected Varnish Cache releases allows remote attackers to forge requests to backend servers over HTTP/2. HTTP/2 pseudo-header values populate req.url and req.method without rejection of spaces, tabs, or empty values before HTTP/1 serialization. HTTP/2 must be enabled, and impact depends on a backend that interprets the malformed request in an exploitable way.

The record

CVE
CVE-2022-45060
Published
Nov 9, 2022
Updated
May 1, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 9, 2022CVE publishedPublication date reported by the CVE source.
  2. May 1, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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