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Fencer Vulns
medium 5.5

CVE-2021-46142 json

An issue was discovered in uriparser before 0.9.6.

published 2022-01-06 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-32842

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

An issue was discovered in uriparser before 0.9.6. It performs invalid free operations in uriNormalizeSyntax.

Patch / fix

  • uriparser_project uriparser 0.9.6
  • uriparser Debian 14, Debian 13, Debian 12 0.9.6+dfsg-1

debian advisories DEBIAN-CVE-2021-46142

  • uriparser Ubuntu 18.04 LTS 0.8.4-1+deb9u2ubuntu0.1
  • uriparser Ubuntu Pro 14.04 LTS 0.7.5-1ubuntu2+esm3
  • uriparser Ubuntu Pro 16.04 LTS 0.8.4-1ubuntu0.16.04.1~esm3
  • uriparser Ubuntu Pro 20.04 LTS 0.9.3-2ubuntu0.1~esm2

ubuntu advisories UBUNTU-CVE-2021-46142

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • uriparser openSUSE Tumbleweed 0.9.6-1.1

opensuse advisories openSUSE-SU-2024:11727-1

  • uriparser Alpine 3.24, Alpine 3.23, Alpine 3.22 +7 more 0.9.6-r0

alpine advisories ALPINE-CVE-2021-46142

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

  • uriparser Arch Linux 0.9.6-1

arch linux advisories AVG-2794

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-2021-46142 updated cvss 4.0

uriparser: Invalid free operations in uriNormalizeSyntax.

  • Red Hat Enterprise Linux 7 uriparser
    affected: no fix planned “Out of support scope”

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

Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/uriparser/uriparser/pull/124 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/uriparser/uriparser/issues/122 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

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.