How severe is CVE-2026-42371?

CVE-2026-42371 has a CVSS 3.x base score of 5.1, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-42371 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42371?

CVE-2026-42371 affects Uriparser Project Uriparser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42371?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-42371 have an EU (EUVD) identifier?

Yes. CVE-2026-42371 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25776.

When was CVE-2026-42371 published?

CVE-2026-42371 was published on 2026-04-27 and last updated on 2026-06-17.

CVE-2026-42371

CVE-2026-42371 is a medium-severity vulnerability in Uriparser Project Uriparser with a CVSS 3.x base score of 5.1. 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-197.

Key facts

Severity: Medium (CVSS 3.x base score 5.1)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25776
Weakness: CWE-197
Affected product: Uriparser Project Uriparser
Published: 2026-04-27
Last modified: 2026-06-17

Description

uriparser before 1.0.1 has numeric truncation in text range comparison, if an application accepts URIs with a length in gigabytes.

Frequently asked questions

What is CVE-2026-42371?: uriparser before 1.0.1 has numeric truncation in text range comparison, if an application accepts URIs with a length in gigabytes.
How severe is CVE-2026-42371?: CVE-2026-42371 has a CVSS 3.x base score of 5.1, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-42371 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42371?: CVE-2026-42371 affects Uriparser Project Uriparser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42371?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42371 have an EU (EUVD) identifier?: Yes. CVE-2026-42371 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25776.
When was CVE-2026-42371 published?: CVE-2026-42371 was published on 2026-04-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:uriparser_project:uriparser:*:*:*:*:*:*:*:*

More vulnerabilities in Uriparser Project Uriparser

CVE-2018-20721 — Critical (CVSS 9.8): URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex* functions) for an…
CVE-2018-19199 — Critical (CVSS 9.8): An issue was discovered in uriparser before 0.9.0. UriQuery.c allows an integer overflow via a uriComposeQuery* or…
CVE-2018-19198 — Critical (CVSS 9.8): An issue was discovered in uriparser before 0.9.0. UriQuery.c allows an out-of-bounds write via a uriComposeQuery* or…
CVE-2024-34402 — High (CVSS 8.6): An issue was discovered in uriparser through 0.9.7. ComposeQueryEngine in UriQuery.c has an integer overflow via long…
CVE-2018-19200 — High (CVSS 7.5): An issue was discovered in uriparser before 0.9.0. UriCommon.c allows attempted operations on NULL input via a…
CVE-2024-34403 — Medium (CVSS 5.9): An issue was discovered in uriparser through 0.9.7. ComposeQueryMallocExMm in UriQuery.c has an integer overflow via a…

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