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CVE-2026-1299

ADVISORY - nist

Summary

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".

EPSS Score⁠: 0.00046 (0.141)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-93⁠

Improper Neutralization of CRLF Sequences ('CRLF Injection')

Impacted images

Advisories

Docker

CREATED

UPDATED

ADVISORY ID

CVE-2026-1299

EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-
RATING UNAVAILABLE FROM ADVISORY
PackageTypeOS NameOS VersionAffected RangesFix Versions
pythondhi--<3.13.123.13.12
pythondhi-->=3.14.0-alpha1,<3.14.33.14.3
pythondhi-->=3.15.0-alpha1,<3.15.0-alpha63.15.0-alpha6

Severity and metrics

No CVSS data available from this advisory.

NIST

CREATED

UPDATED

ADVISORY IDCVE-2026-1299⁠
EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)
CWE-93⁠

CVSS SCORE

6medium

Debian

CREATED

UPDATED

ADVISORY IDCVE-2026-1299⁠
EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-
RATING UNAVAILABLE FROM ADVISORY

Ubuntu

CREATED

UPDATED

ADVISORY IDCVE-2026-1299⁠
EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Amedium

Alma

CREATED

UPDATED

ADVISORY IDALSA-2026:2128⁠
EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Amedium

Amazon

CREATED

UPDATED

ADVISORY IDALAS2023-2026-1437⁠
EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Amedium

Amazon

CREATED

UPDATED

ADVISORY IDALAS2023-2026-1444⁠
EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Amedium

Bitnami

CREATED

UPDATED

ADVISORY ID

BIT-libpython-2026-1299

EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

6medium

Bitnami

CREATED

UPDATED

ADVISORY ID

BIT-python-2026-1299

EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

6medium

Bitnami

CREATED

UPDATED

ADVISORY ID

BIT-python-min-2026-1299

EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

6medium

Oracle

CREATED

UPDATED

ADVISORY IDELSA-2026-2128⁠
EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Amedium

Chainguard

CREATED

UPDATED

ADVISORY ID

CGA-pjgm-mfph-cxr6

EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-
RATING UNAVAILABLE FROM ADVISORY