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Vulnerabilities

Vulnerability · CVE-2026-22690

pypdf is a free and open-source pure-python PDF library.

Published Jan 10, 2026 · catalog updated Nov 2, 2026 · pypdf is a free

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-22690. EPSS is 0.43%. Act only if a listed version of pypdf is a free is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (pypdf is a free).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Low2.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.43%
Remediation
Version ranges on file
Affected products
cpe py-pdf/pypdf · vendor py-pdf pypdf < 6.6.0

pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the /Root entry in the trailer, while using a rather large /Size value. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe py-pdf/pypdf< 6.6.0
  • vendor py-pdf pypdf < 6.6.0< 6.6.0

How to fix CVE-2026-22690

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-22690. EPSS is 0.43%. Act only if a listed version of pypdf is a free is installed.

Which versions are affected?

Compare what you have installed with py-pdf pypdf < 6.6.0 < 6.6.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-400: Uncontrolled Resource Consumption. EPSS 0.43%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 10, 2026 · EUVD

    Detected

    pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the /Root entry in the trailer, while using a rather large /Size value. Only the

  2. Jan 12, 2026 · EUVD

    Updated

    pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the /Root entry in the trailer, while using a rather large /Size value. Only the

  3. Nov 2, 2026 · NIST NVD

    Updated

    pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the /Root entry in the trailer, while using a rather large /Size value. Only the

Sources

  • CVE.orgVulnerability recordCVE-2026-22690

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-22690

    30-day exploitation probability 0.43%

    first.org
  • EUVDVulnerability recordEUVD-2026-1692

    pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid f

    euvd.enisa.europa.eu
  • NIST NVDVulnerability recordCVE-2026-22690

    pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid f

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 3, 2026
  • NIST NVDNov 2, 2026
  • CVE.orgOct 30, 2026
  • EUVDOct 30, 2026