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CVE-2026-9538VulnerabilityPublished Updated

Red Hat Security Advisory: perl-Archive-Tar security update

Affects Red Hat perl-Archive-TarSource GCVE Database

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Authoritative record:CVE-2026-9538· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade Red Hat Archive-Tar to 3.10 soon.

Data as of 6 Nov 2026, 04:33 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 3.10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 May 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 5 Nov 2026.

What to do

Upgrade Archive::Tar and Archive-Tar to 3.10.

Affected software

ProductAffectedFixed in
BINGOSArchive::TarAffected
  • <3.10
Fixed in
  • 3.10
GitHubArchive-Tarpkg:github/Archive-TarOther threatsAffected
  • <3.10
Fixed in
  • 3.10

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 an official security update for perl-Archive-Tar in Red Hat Enterprise Linux 10 to fix this denial of service vulnerability. Users should apply the updated packages as described in the Red Hat advisory (RHSA-2026:49523) and the referenced update article. No additional mitigation steps are indicated beyond applying the official patch.

Description

A denial of service vulnerability (CVE-2026-9538) exists in the perl-Archive-Tar module used by Red Hat Enterprise Linux 10. The flaw involves processing a crafted tar header with a large entry size, which can cause a denial of service. Red Hat has issued an important security update to address this issue in multiple architectures of RHEL 10. The vulnerability affects the handling of tar files, including compressed or gzipped tar files if IO::Zlib is installed.

References

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