PT-2025-48734 · Git · Cpython

Published 2025-12-01 · Updated 2025-12-01

OSV

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.

Related Identifiers

PSF-2025-14

Affected Products

Cpython

References · 10

• https://osv.dev/vulnerability/PSF-2025-14 · Vendor Advisory
• https://github.com/python/cpython/issues/119451 · Note
• https://github.com/python/cpython/pull/119454 · Note
• https://github.com/python/cpython/commit/afc40bdd3dd71f343fd9016f6d8eebbacbd6587c · Note
• https://github.com/python/cpython/commit/5dc101675fd22918facbbe0fecdc821502beaaf0 · Note
• https://github.com/python/cpython/commit/14b1fdb0a94b96f86fc7b86671ea9582b8676628 · Note
• https://github.com/python/cpython/commit/5a4c4a033a4a54481be6870aa1896fad732555b5 · Note
• https://github.com/python/cpython/commit/4ce27904b597c77d74dd93f2c912676021a99155 · Note
• https://github.com/python/cpython/commit/289f29b0fe38baf2d7cb5854f4bb573cc34a6a15 · Note
• https://mail.python.org/archives/list/[e-mail]/thread/OQ6G7MKRQIS3OAREC3HNG3D2DPOU34XO · Note