How severe is CVE-2022-34028?

CVE-2022-34028 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-2022-34028 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-34028?

CVE-2022-34028 affects F5 Njs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-34028?

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-2022-34028 published?

CVE-2022-34028 was published on 2022-07-18 and last updated on 2026-06-17.

CVE-2022-34028

CVE-2022-34028 is a high-severity vulnerability in F5 Njs 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.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: F5 Njs
Published: 2022-07-18
Last modified: 2026-06-17

Description

Nginx NJS v0.7.5 was discovered to contain a segmentation violation via njs_utf8_next at src/njs_utf8.h.

Frequently asked questions

What is CVE-2022-34028?: Nginx NJS v0.7.5 was discovered to contain a segmentation violation via njs_utf8_next at src/njs_utf8.h.
How severe is CVE-2022-34028?: CVE-2022-34028 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-2022-34028 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-34028?: CVE-2022-34028 affects F5 Njs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-34028?: 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-2022-34028 published?: CVE-2022-34028 was published on 2022-07-18 and last updated on 2026-06-17.

References

https://github.com/nginx/njs/issues/522

Affected products (1)

cpe:2.3:a:f5:njs:0.7.5:*:*:*:*:*:*:*

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