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CVE-2026-19953VulnerabilityPublished Updated

Red Hat Security Advisory: perl-URI security update

Affects Red Hat perl-URISource GCVE Database

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Authoritative record:CVE-2026-19953· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium : upgrade Red Hat URI to 5.36 when convenient.

Data as of 29 Oct 2026, 09:13 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.36
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 31 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade URI to 5.36.

Affected software

ProductAffectedFixed in
CPANURIpkg:cpan/URIOther threatsAffected
  • <5.36
Fixed in
  • 5.36

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This module implements the URI class. Objects of this class represent "Uniform Resource Identifier references" as specified in RFC 2396 (and updated by RFC 2732). Security Fix(es): * URI: URI (for Perl): Security bypass due to incorrect hostname encoding via missing Unicode normalization (CVE-2026-19953) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

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