Resource exhaustion in Py-pdf Pypdf
CVE-2025-55197
pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0, an attacker can craft a PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode filters is used on a malici…
Vulnerability class: DoS (Denial of Service)
EPSS: 0.004 (32.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Py-pdf Pypdf — versions < 6.0.0
- Pypdf_project Pypdf
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory, Mitigation)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2025-55197?
- CVE-2025-55197 is a high-severity vulnerability in Py-pdf Pypdf, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2025-08-13.
- How severe is CVE-2025-55197?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-55197 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.