CVE-2026-3644High· 7.5▾ TwilightThe fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additio…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.4%
0.4% → 0.5%
The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().
python < 3.13.13python >= 3.14.0, < 3.14.4python = 3.15.0Upgrade past the affected range:
python 3.14.4Connected by shared product, vendor, weakness, or advisory.
CVE-2026-4519Low· 3.3The webbrowser.open() API would accept leading dashes in the URL which could be handled as command line options for certain web browsers
CVE-2025-13462Low· 3.3The "tarfile" module would still apply normalization of AREGTYPE (\x00) blocks to DIRTYPE, even while processing a multi-block member such as GNUTYPE_LONGNAME or GNUTYPE_LONGLINK
CVE-2026-6019Medium· 6.1http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes " for JavaScript string context
CVE-2025-13837Medium· 5.5When loading a plist file, the plistlib module reads data in size specified by the file itself, meaning a malicious file can cause OOM and DoS issues
CVE-2025-13836High· 7.5When reading an HTTP response from a server, if no read amount is specified, the default behavior will be to use Content-Length
CVE-2026-54981High· 7.8Inclusion of functionality from untrusted control sphere in Visual Studio Code - Python extension allows an unauthorized attacker to bypass a security feature locally.