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CVE-2026-19953VulnerabilityPublished

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 11 Nov 2026, 14:47 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
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 11 Nov 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.

AI-suggested

Red Hat has released updated perl-URI packages for Red Hat Enterprise Linux 9 that address this vulnerability. Users should apply the provided security update as detailed in Red Hat advisory RHSA-2026:98472 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.

Description

A security vulnerability (CVE-2026-19953) affects the perl-URI module used in Red Hat Enterprise Linux 9. The flaw involves a security bypass caused by incorrect hostname encoding due to missing Unicode normalization. This vulnerability has been rated as moderate severity by Red Hat Product Security. An update to the perl-URI package has been issued to address this issue.

References

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