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VulnerabilityPublished Updated

CVE-2026-24688: Psutils · pypdf has possible Infinite Loop when processing outlines/bookmarks

Affects psutilsSource GCVE Database

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Authoritative record:CVE-2026-24688· Medium 5.1

Not known to be exploited · CVSS 5.1 Medium : upgrade to 3.3.14_4 when convenient.

Data as of 1 Nov 2026, 00:22 UTC

CVSS 4.0 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 3.3.14_4
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Jan 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 31 Oct 2026.

What to do

Upgrade psutils to 3.3.14_4.

Affected software

ProductAffectedFixed in
Homebrewpsutilspkg:brew/psutilsOther threatsAffected
  • >=3.0 <3.3.14_4
Fixed in
  • 3.3.14_4

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

AI-suggested

Upgrade to psutils version 3.3.14_4 or later, which includes the fix for this vulnerability. If immediate upgrade is not possible, apply the changes from pull request #3610 on the pypdf GitHub repository as a temporary workaround.

Description

A vulnerability in psutils' pypdf component allows an attacker to craft a PDF that triggers an infinite loop when processing outlines or bookmarks. This flaw can cause denial of service by making the application hang. The issue has been fixed in pypdf version 6.6.2. Users unable to upgrade immediately can apply the changes from the referenced pull request as a workaround.

References

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