2.4
Low
CVE-2026-18503 Attacker-controlled CSV samples can trigger super-linear regular-expression work during dialect sniffing and consume…
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().
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| CPython 3.16 | 3.16.0a1 → < 3.16.0 | 3.16.0 |
| CPython 3.15 | 3.15.0a1 → < 3.15.0rc1 | 3.15.0rc1 |
| CPython 3.14 | 3.14.0 → < 3.14.7 | 3.14.7 |
| CPython 3.13 | 3.13.0 → < 3.13.15 | 3.13.15 |
| CPython 3.12 | 3.12.0 → < 3.12.14 | 3.12.14 |
| CPython 3.11 | 3.11.0 → < 3.11.16 | 3.11.16 |
| CPython 3.10 | earliest → < 3.10.21 | 3.10.21 |
References
- mail.python.org mail.python.org
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified
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