How severe is CVE-2022-38150?

CVE-2022-38150 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-38150 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-38150?

CVE-2022-38150 primarily affects Varnish Cache Project Varnish Cache. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-38150?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-38150 published?

CVE-2022-38150 was published on 2022-08-11 and last updated on 2026-06-17.

CVE-2022-38150

CVE-2022-38150 is a high-severity vulnerability in Varnish Cache Project Varnish Cache with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Varnish Cache Project Varnish Cache
Published: 2022-08-11
Last modified: 2026-06-17

Description

In Varnish Cache 7.0.0, 7.0.1, 7.0.2, and 7.1.0, it is possible to cause the Varnish Server to assert and automatically restart through forged HTTP/1 backend responses. An attack uses a crafted reason phrase of the backend response status line. This is fixed in 7.0.3 and 7.1.1.

Frequently asked questions

What is CVE-2022-38150?: In Varnish Cache 7.0.0, 7.0.1, 7.0.2, and 7.1.0, it is possible to cause the Varnish Server to assert and automatically restart through forged HTTP/1 backend responses. An attack uses a crafted reason phrase of the backend response status line. This is fixed in 7.0.3 and 7.1.1.
How severe is CVE-2022-38150?: CVE-2022-38150 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-38150 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-38150?: CVE-2022-38150 primarily affects Varnish Cache Project Varnish Cache. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-38150?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-38150 published?: CVE-2022-38150 was published on 2022-08-11 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:varnish_cache_project:varnish_cache:7.0.0:*:*:*:*:*:*:*
cpe:2.3:a:varnish_cache_project:varnish_cache:7.0.1:*:*:*:*:*:*:*
cpe:2.3:a:varnish_cache_project:varnish_cache:7.0.2:*:*:*:*:*:*:*
cpe:2.3:a:varnish_cache_project:varnish_cache:7.1.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*

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