CVEvulnerability
CVE-2026-18503
2.4 LOW
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-08-10
- Last modified
- 2026-10-23
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 2.4 LOW — CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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
- Weaknesses
- CWE-1176
Description
Attacker-controlled CSV samples can trigger super-linear
regular-expression work during dialect sniffing and consume significant
CPU when applications pass unbounded input to csv.Sniffer.sniff().
Related
Weakness · CWE (1)
- CWE-1176 Inefficient CPU Computation weakness
References
- https://github.com/python/cpython/commit/063d4555c94ef412c731527dbf30193327f2ee82 github.com
- https://github.com/python/cpython/commit/476fb09cdb0d73e645849d98c610e7e5697ce7c9 github.com
- https://github.com/python/cpython/commit/89f29c760c02774b099ddd6863268eb13fa3946a github.com
- https://github.com/python/cpython/commit/b09a67a20c464f8288c9f9a6b9c7082a74560024 github.com
- https://github.com/python/cpython/commit/b30c7fa9edd921a118f286e9f90f560777fa693b github.com
- https://github.com/python/cpython/commit/fd78b565d7c326f96ae903ab945b47f35d829cf4 github.com
- https://github.com/python/cpython/issues/98820 github.com
- https://github.com/python/cpython/pull/153694 github.com
- https://mail.python.org/archives/list/[email protected]/thread/KQ7NBMCPAZJHRROQXJQE4GMXGLD5KHBS/ mail.python.org