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Python Software Foundation — Vulnerabilities & Security Advisories 71

Browse all 71 CVE security advisories affecting Python Software Foundation. AI-powered Chinese analysis, POCs, and references for each vulnerability.

The Python Software Foundation (PSF) is a non-profit organization dedicated to protecting and advancing the Python programming language while supporting and facilitating the growth of a diverse global community of developers. As the steward of the official Python distribution, its core business involves maintaining the integrity of the interpreter and standard library, which are foundational to countless enterprise and scientific applications. Historically, vulnerabilities associated with the PSF’s maintained codebase have frequently involved memory corruption issues, such as buffer overflows, and logic flaws leading to privilege escalation or remote code execution (RCE) within the interpreter itself. While the PSF does not host third-party packages, its official releases have occasionally been targeted by supply chain attacks or misconfigurations in associated infrastructure. Notable incidents include critical flaws in the SSL/TLS handling and integer overflow bugs in the standard library, prompting rigorous security audits and rapid patch cycles to mitigate risks for the vast ecosystem relying on Python’s core infrastructure.

Found 70 results / 71 Clear Filters
Top products by Python Software Foundation: CPython pymanager
CVE ID Title CVSS Severity Published
CVE-2026-15310 zipfile: bzip2/LZMA/Zstandard members decompress without a max_length bound, defeating chunked-read memory limits — CPython CWE-400 2.1 Low 2026-08-25
CVE-2026-19672 tarfile extraction filter bypass allows creation of directories outside the destination — CPython 6.3 Medium 2026-08-19
CVE-2026-15806 `HTTPPasswordMgr` can send saved HTTPS credentials via HTTP because of incorrect scheme matching — CPython CWE-319 6.0 Medium 2026-08-18
CVE-2026-17084 stringprep.map_table_b2() deviates from RFC 3454 Table B.2 — CPython 6.0 Medium 2026-08-18
CVE-2026-18503 Super-linear CPU usage for unbounded input to csv.Sniffer.sniff() — CPython CWE-1176 2.4 Low 2026-08-10
CVE-2026-6879 Quadratic Behavior in xml.etree.ElementPath Index Predicates — CPython 2.0 Low 2026-07-28
CVE-2026-15308 Incremental HTMLParser feed() allows CPU-exhaustion DoS via repeated unterminated markup declarations — CPython CWE-400 8.7 High 2026-07-09
CVE-2026-4360 Tarfile.extract() doesn't fully respect filter parameter — CPython CWE-281 2.0 Low 2026-06-30
CVE-2026-11972 tarfile opened in streaming mode mishandles EOF — CPython CWE-252 8.2 High 2026-06-23
CVE-2026-0864 Configuration Injection via Carriage Return (\r) in write() method — CPython 4.1 Medium 2026-06-23
CVE-2026-11940 tarfile extraction filter bypass allows escaping the destination directory — CPython CWE-22 7.8 High 2026-06-23
CVE-2026-12003 CPython >3.11 Insecure Input Validation resulting in privilege escalation — CPython CWE-427 5.3 Medium 2026-06-16
CVE-2026-9669 bz2.BZ2Decompressor reuse after error can cause a stack buffer overflow — CPython CWE-121 8.2 High 2026-06-08
CVE-2026-7774 tarfile.data_filter path traversal bypass allows writing outside the extraction directory — CPython CWE-22 6.9 Medium 2026-06-04
CVE-2026-3276 Potential DoS via quadratic complexity in unicodedata.normalize() — CPython CWE-407 6.3 Medium 2026-06-03
CVE-2026-8328 FTP PASV SSRF, ftpcp() does not use actual peer address, trusts server-supplied PASV host address — CPython CWE-918 5.9 Medium 2026-05-13
CVE-2026-7210 The expat and elementtree parsers use insufficient entropy for XML hash-flooding protection — CPython CWE-331 6.3 Medium 2026-05-11
CVE-2026-3087 shutil.unpack_archive() doesn't check for Windows absolute paths in ZIPs — CPython CWE-22 6.0 Medium 2026-04-27
CVE-2026-6019 BaseCookie.js_output() does not neutralize embedded characters — CPython CWE-150 6.1AI Medium AI 2026-04-22
CVE-2026-3298 Out-of-bounds write in Windows asyncio.ProacterEventLoop.sock_recvfrom_into() when using nbytes — CPython CWE-787 8.8 High 2026-04-21
CVE-2026-5713 Out-of-bounds read/write during remote profiling and asyncio process introspection when connecting to malicious target — CPython CWE-121 5.3 Medium 2026-04-14
CVE-2026-4786 Incomplete mitigation of CVE-2026-4519, %action expansion for command injection to webbrowser.open() — CPython CWE-77 7.0 High 2026-04-13
CVE-2026-6100 Use-after-free in lzma.LZMADecompressor, bz2.BZ2Decompressor, and gzip.GzipFile after re-use under memory pressure — CPython CWE-416 9.1 Critical 2026-04-13
CVE-2026-3446 Base64 decoding stops at first padded quad by default — CPython 8.2AI High AI 2026-04-10
CVE-2026-1502 HTTP client proxy tunnel headers not validated for CR/LF — CPython 5.7 Medium 2026-04-10
CVE-2026-4519 webbrowser.open() allows leading dashes in URLs — CPython 7.0 High 2026-03-20
CVE-2026-3479 pkgutil.get_data() does not enforce documented restrictions — CPython 7.5 - 2026-03-18
CVE-2026-4224 Stack overflow parsing XML with deeply nested DTD content models — CPython 6.0 Medium 2026-03-16
CVE-2026-3644 Incomplete control character validation in http.cookies — CPython 6.0 Medium 2026-03-16
CVE-2025-13462 tarfile: Skip DIRTYPE normalization during GNU LONGNAME/LONGLINK handling — CPython 2.0 Low 2026-03-12

This page lists every published CVE security advisory associated with Python Software Foundation. Each entry links to a detailed page with CVSS scoring, CWE classification, affected products and references. AI-generated Chinese analysis is provided for fast triage.