Skip to content
Fencer Vulns
medium 5.1

CVE-2026-42371 json

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

published 2026-04-27 6 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-25776

cvss
5.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits
0
none known

Summary

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

Patch / fix

  • uriparser uriparser 1.0.1
  • uriparser Debian 14 1.0.1+dfsg-1

debian advisories DEBIAN-CVE-2026-42371

  • uriparser hummingbird 1 1.0.1-1.hum1
  • mingw32-uriparser hummingbird 1 1.0.1-1.hum1
  • mingw64-uriparser hummingbird 1 1.0.1-1.hum1

red hat advisories RHSA-2026:12430

  • uriparser SLE Module for Package Hub 15 SP7 0.8.5-150000.3.14.1
  • uriparser SLES for SAP applications 16.0, SLES 16.0 0.9.8-160000.5.1

suse advisories SUSE-SU-2026:3021-1SUSE-SU-2026:22627-1

  • uriparser openSUSE Leap 16.0 0.9.8-160000.5.1
  • uriparser openSUSE Tumbleweed 1.0.2-1.1
  • php8 openSUSE Tumbleweed 8.5.6-1.1

opensuse advisories openSUSE-SU-2026:21297-1openSUSE-SU-2026:11049-1openSUSE-SU-2026:10747-1

  • php85 Alpine 3.24, Alpine 3.23 8.5.6-r0

alpine advisories ALPINE-CVE-2026-42371

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-42371 updated cvss 4.7

uriparser: uriparser: Denial of Service via numeric truncation with oversized URIs

  • Red Hat Enterprise Linux 7 uriparser Red Hat Enterprise Linux AI (RHEL AI) 3 uriparser
    affected: no fix available “Fix deferred”
  • Red Hat Hardened Images uriparser 1.0.1-1.hum1, mingw32-uriparser 1.0.1-1.hum1, mingw64-uriparser 1.0.1-1.hum1
    fixed: vendor fix RHSA-2026:12430

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.1 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 5.1 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • uriparser uriparser

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.