Description
CPython 3.9 and earlier doesn't disallow configuring an empty list ("[]") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured).
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| libpython | — | — |
| python | — | — |
| python-min | — | — |
| unknown | — | — |
Similar Threats
- High BIT-libpython-2026-4519
- Low BIT-libpython-2026-3479
- Medium BIT-libpython-2026-3644
- Low BIT-libpython-2025-13462
- Medium BIT-libpython-2026-2297
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