Resource exhaustion in Python
CVE-2025-13837
When loading a plist file, the plistlib module reads data in size specified by the file itself, meaning a malicious file can cause OOM and DoS issues
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (11.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Python — versions 3.15.0
- Python Software Foundation Cpython — versions 0, 3.11.0, 3.12.0
Weakness classification (CWE)
References
- github.com/python/cpython/pull/119343 (Patch, patch, Issue Tracking)
- github.com/python/cpython/issues/119342 (issue-tracking, Patch, Issue Tracking)
- github.com/python/cpython/commit/694922cf40aa3a28f898b5f5ee08b71b4922df70 (Patch, patch)
- github.com/python/cpython/commit/71fa8eb8233b37f16c88b6e3e583b461b205d1ba (Patch, patch)
- github.com/python/cpython/commit/b64441e4852383645af5b435411a6f849dd1b4cb (Patch, patch)
- mail.python.org/archives/list/security-announce@python.org/thread/2X5IBCJXRQAZ5… (vendor-advisory, Vendor Advisory)
- github.com/python/cpython/commit/5a8b19677d818fb41ee55f310233772e15aa1a2b (Patch, patch)
- github.com/python/cpython/commit/568342cfc8f002d9a15f30238f26b9d2e0e79036 (patch)
- github.com/python/cpython/commit/cefee7d118a26ef6cd43db59bb9d98ca9a331111 (patch)
Frequently asked questions
- What is CVE-2025-13837?
- CVE-2025-13837 is a medium-severity vulnerability in Python, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2025-12-01.
- How severe is CVE-2025-13837?
- Medium severity. CVSS v3 base score is 5.5 out of 10.