CVEvulnerability
CVE-2025-13836
6.3 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2025-12-01
- Last modified
- 2026-09-03
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 6.3 MEDIUM — CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-400
Description
When reading an HTTP response from a server, if no read amount is specified, the default behavior will be to use Content-Length. This allows a malicious server to cause the client to read large amounts of data into memory, potentially causing OOM or other DoS.
Affected configurations
• python python (< 3.10.20)
• python python (>= 3.11.0 < 3.11.15)
• python python (>= 3.12.0 < 3.12.13)
• python python (>= 3.13.0 < 3.13.11)
• python python 3.14.0
• python python 3.15.0
Related
Weakness · CWE (1)
- CWE-400 Uncontrolled Resource Consumption weakness
References
- https://github.com/python/cpython/commit/14b1fdb0a94b96f86fc7b86671ea9582b8676628 Patch
- https://github.com/python/cpython/commit/289f29b0fe38baf2d7cb5854f4bb573cc34a6a15 Patch
- https://github.com/python/cpython/commit/4ce27904b597c77d74dd93f2c912676021a99155 Patch
- https://github.com/python/cpython/commit/5a4c4a033a4a54481be6870aa1896fad732555b5 Patch
- https://github.com/python/cpython/commit/5dc101675fd22918facbbe0fecdc821502beaaf0 Patch
- https://github.com/python/cpython/commit/afc40bdd3dd71f343fd9016f6d8eebbacbd6587c Patch
- https://github.com/python/cpython/issues/119451 Issue Tracking, Patch
- https://github.com/python/cpython/pull/119454 Issue Tracking, Patch
- https://mail.python.org/archives/list/[email protected]/thread/OQ6G7MKRQIS3OAREC3HNG3D2DPOU34XO/ Vendor Advisory