Most severe vulnerabilities for "python python" 3.15.0-alpha8

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Python html.parser.HTMLParserIncremental HTMLParser feed() allows CPU-exhaustion DoS via repeated unterminated markup declarations

Risk 51

Severity

8.7

Trending

3 Months

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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

Incremental HTMLParser feed() allows CPU-exhaustion DoS via repeated unterminated markup declarations

1 / 4

Source: Microsoft

First published (updated )

CVE-2026-15308

Python Software Foundation CPythonThe expat and elementtree parsers use insufficient entropy for XML hash-flooding protection

Risk 32

Severity

6.3

EPSS

0.06%

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/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

xml.parsers.expat and xml.etree.ElementTree use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying this patch.

1 / 3

Source: IBM

First published (updated )

CVE-2026-7210

Python Python (shutil.unpack_archive)shutil.unpack_archive() doesn't check for Windows absolute paths in ZIPs

Risk 46

Severity

Path Traversal

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/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

If shutil.unpackarchive() is given a ZIP archive with an absolute Windows path containing a drive (C:\\...) then the archive will be extracted outside the target directory which is different than other operating systems. Only Windows is affected by this vulnerability.

1 / 2

Source: MITRE

First published (updated )

CVE-2026-3087

Python configparserConfiguration Injection via Carriage Return (\r) in write() method

Risk 32

Severity

4.1

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/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

Configuration Injection via Carriage Return (\r) in write() method

1 / 2

Source: Microsoft

First published (updated )

CVE-2026-0864

Python http.cookies.MorselBaseCookie.js_output() does not neutralize embedded characters

Risk 27

Severity

2.1

EPSS

0.06%

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/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

BaseCookie.jsoutput() does not neutralize embedded characters

1 / 3

Source: Microsoft

First published (updated )

CVE-2026-6019

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