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CVE-2022-38150

25
FAUCET Score

CVE-2022-38150 is a high-severity vulnerability affecting Varnish Cache versions 7.0.0 through 7.1.0, including specific Fedora Project distributions. An unauthenticated attacker can trigger a denial-of-service by sending a specially crafted HTTP/1 backend response, causing the Varnish server to assert and restart. While the CVSS score is 7.5 (High), there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage. Patches are available in Varnish Cache versions 7.0.3 and 7.1.1.

Impacted Technologies

VendorProductVersion(s)CPE
7.0.0CPE matchmatch criteria
cpe:2.3:a:varnish_cache_project:varnish_cache:7.0.0:*:*:*:*:*:*:*
7.0.1CPE matchmatch criteria
cpe:2.3:a:varnish_cache_project:varnish_cache:7.0.1:*:*:*:*:*:*:*
7.0.2CPE matchmatch criteria
cpe:2.3:a:varnish_cache_project:varnish_cache:7.0.2:*:*:*:*:*:*:*
7.1.0CPE matchmatch criteria
cpe:2.3:a:varnish_cache_project:varnish_cache:7.1.0:*:*:*:*:*:*:*
35CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.17%
Probability of exploitation in next 30 days
EPSS Percentile
64.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0117 is in the 43rd percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2022-38150Moderate

varnish: denial of service via colon-starting reason phrase

Aug 9, 2022

References

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/M4KVVCIQVINQQ2D7ORNARSYALMJUMP3I
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/TW3X4PEKC5C736SCKE2UG3Y7JWKMD2K6
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/V2BUKFICLZBXESLQ3MXMIG3G52RZURFK
varnish-cache.org / security/VSV00009.html
MitigationVendor Advisory