PatchTheCVECVE-2026-119206: pypdf is a free and open-source pure-python PDF library
CVE-2026-119206 is a medium-severity flaw (CVSS 5.5) affecting pypdf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can take excessive time to retrieve page labels from a crafted PDF containing a flat page-label number tree with many ranges. The page_labels property resolves each page independently and repeatedly scans the same /Nums array from the beginning, causing work to grow with both the page count and the number of label ranges. This issue is fixed in version 6.21.3.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.5 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.3% (top 77%) |
| CISA exploited list | No |
| Weakness | CWE-400 |
| Published | 2026-10-29 |
| Last modified | 2026-11-02 |
Last updated 2026-11-02 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Advisories and coverage
Research and news
- Vulners Bulletins: CVE-2026-119206 vulnerabilities 2026-10-31
- Vulners Bulletins: CVE-2026-119206 2026-10-30
- VulDB Recent Entries: CVE-2026-119206 | py-pdf pypdf up to 6.21.2 Page Labels resource consumption 2026-10-29
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-119206?
pypdf: upgrade to 6.21.3. Exact commands for each OS are on this page.
Is CVE-2026-119206 being exploited?
CVE-2026-119206 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-119206 affect?
CVE-2026-119206 affects pypdf. Severity is medium (CVSS 5.5). pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can take excessive time to retrieve page labels from a crafted PDF containing a flat page-label number tree with many ranges. The page_labels property resolves
How urgent is CVE-2026-119206?
Priority 25/100. No elevated risk signals yet.
Software pages
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