CVEvulnerability
CVE-2023-36632
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2023-06-25
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-674
Description
The legacy email.utils.parseaddr function in Python through 3.11.4 allows attackers to trigger "RecursionError: maximum recursion depth exceeded while calling a Python object" via a crafted argument. This argument is plausibly an untrusted value from an application's input data that was supposed to contain a name and an e-mail address. NOTE: email.utils.parseaddr is categorized as a Legacy API in the documentation of the Python email package. Applications should instead use the email.parser.BytesParser or email.parser.Parser class. NOTE: the vendor's perspective is that this is neither a vulnerability nor a bug. The email package is intended to have size limits and to throw an exception when limits are exceeded; they were exceeded by the example demonstration code.
Affected configurations
• python python (<= 3.11.4)
Related
Weakness · CWE (1)
- CWE-674 Uncontrolled Recursion weakness
References
- https://docs.python.org/3/library/email.html Product
- https://docs.python.org/3/library/email.utils.html Product
- https://github.com/Daybreak2019/PoC_python3.9_Vul/blob/main/RecursionError-email.utils.parseaddr.py Product
- https://github.com/python/cpython/issues/103800 Exploit, Issue Tracking
- https://docs.python.org/3/library/email.html Product
- https://docs.python.org/3/library/email.utils.html Product
- https://github.com/Daybreak2019/PoC_python3.9_Vul/blob/main/RecursionError-email.utils.parseaddr.py Product
- https://github.com/python/cpython/issues/103800 Exploit, Issue Tracking