6

CVE-2026-1299

The 
email module, specifically the "BytesGenerator" class, didn’t properly quote newlines for email headers when 
serializing an email message allowing for header injection when an email
 is serialized. This is only applicable if using "LiteralHeader" writing headers that don't respect email folding rules, the new behavior will reject the incorrectly folded headers in "BytesGenerator".
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Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerPython Software Foundation
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Produkt CPython
Default Statusunaffected
Version < 3.13.12
Version 0
Status affected
Version < 3.14.3
Version 3.14.0
Status affected
Version < 3.15.0
Version 3.15.0a1
Status affected
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.03% 0.085
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
cna@python.org 6 0 0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/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
CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')

The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.