CVE-2025-13836
HIGH severity · CVSS 7.5 · Uncontrolled resource consumption
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/python/cpython/commit/14b1fdb0a94b96f86fc7b86671ea9582b8676628 ↗
Additional information
- NVD record
- https://github.com/python/cpython/commit/14b1fdb0a94b96f86fc7b86671ea9582b8676628Patch
- https://github.com/python/cpython/commit/289f29b0fe38baf2d7cb5854f4bb573cc34a6a15Patch
- https://github.com/python/cpython/commit/4ce27904b597c77d74dd93f2c912676021a99155Patch
- https://github.com/python/cpython/commit/5a4c4a033a4a54481be6870aa1896fad732555b5Patch
- https://github.com/python/cpython/commit/5dc101675fd22918facbbe0fecdc821502beaaf0Patch
- https://github.com/python/cpython/commit/afc40bdd3dd71f343fd9016f6d8eebbacbd6587cPatch
- https://github.com/python/cpython/issues/119451Patch
- https://github.com/python/cpython/pull/119454Patch