synced 8 MIN AGO
01 Record

CVE-2026-1299

email BytesGenerator header injection due to unquoted newlines

MediumPUBLISHEDCNA: PSF
CNA base score6.0 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
View raw JSON

02 Description

email BytesGenerator header injection due to unquoted newlines

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.57% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 47.0% of scored records. A rank, not a probability.
NVD base score
6.0 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
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
NVD analysis status
Deferred. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-01-23 16:27Z9 MO AGO
Last updated
2026-03-03 14:43Z8 MO AGO
Reserved
2026-01-21
Assigning CNA
PSF
Record state
PUBLISHED
Severity
Medium (CVSS 6.0)
CNA CVSS vector
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
Weaknesses
  • CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')Base
Data version
5.2
Document digest
a6a1b64d88e93d2ab4deed6c08d5b14bd3a607d14db5a41cdfc6aea1edc3d261

05 Affected products

VendorProductVersionsPlatforms
Python Software FoundationCPython0 to < 3.10.20, 3.11.0 to < 3.11.15, 3.12.0 to < 3.12.13, 3.13.0 to < 3.13.12, 3.14.0 to < 3.14.3, 3.15.0a1 to < 3.15.0a6—

06 References

07 Fixed in

AlmaLinux 8

  • platform-python
    Fixed in 3.6.8-73.el8_10.alma.1
  • platform-python-debug
    Fixed in 3.6.8-73.el8_10.alma.1
  • platform-python-devel
    Fixed in 3.6.8-73.el8_10.alma.1
  • python3-idle
    Fixed in 3.6.8-73.el8_10.alma.1
  • python3-libs
    Fixed in 3.6.8-73.el8_10.alma.1
  • python3-test
    Fixed in 3.6.8-73.el8_10.alma.1
  • python3-tkinter
    Fixed in 3.6.8-73.el8_10.alma.1
  • python3.11
    Fixed in 3.11.13-5.el8_10
  • python3.11-debug
    Fixed in 3.11.13-5.el8_10
  • python3.11-devel
    Fixed in 3.11.13-5.el8_10
  • python3.11-idle
    Fixed in 3.11.13-5.el8_10
  • python3.11-libs
    Fixed in 3.11.13-5.el8_10
  • python3.11-rpm-macros
    Fixed in 3.11.13-5.el8_10
  • python3.11-test
    Fixed in 3.11.13-5.el8_10
  • python3.11-tkinter
    Fixed in 3.11.13-5.el8_10
  • python3.12
    Fixed in 3.12.12-3.el8_10
  • python3.12-debug
    Fixed in 3.12.12-3.el8_10
  • python3.12-devel
    Fixed in 3.12.12-3.el8_10
  • python3.12-idle
    Fixed in 3.12.12-3.el8_10
  • python3.12-libs
    Fixed in 3.12.12-3.el8_10
  • python3.12-rpm-macros
    Fixed in 3.12.12-3.el8_10
  • python3.12-test
    Fixed in 3.12.12-3.el8_10
  • python3.12-tkinter
    Fixed in 3.12.12-3.el8_10

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • python-unversioned-command
    Fixed in 3.9.25-3.el9_7.1
  • python3
    Fixed in 3.9.25-3.el9_7.1
  • python3-debug
    Fixed in 3.9.25-3.el9_7.1
  • python3-devel
    Fixed in 3.9.25-3.el9_7.1
  • python3-idle
    Fixed in 3.9.25-3.el9_7.1
  • python3-libs
    Fixed in 3.9.25-3.el9_7.1
  • python3-test
    Fixed in 3.9.25-3.el9_7.1
  • python3-tkinter
    Fixed in 3.9.25-3.el9_7.1
  • python3.11
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-debug
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-devel
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-idle
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-libs
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-test
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-tkinter
    Fixed in 3.11.13-5.1.el9_7
  • python3.12
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-debug
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-devel
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-idle
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-libs
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-test
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-tkinter
    Fixed in 3.12.12-4.el9_7.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 10

  • python-unversioned-command
    Fixed in 3.12.12-3.el10_1.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • platform-python
    Fixed in 3.6.8-73.el8_10.alma.1
  • platform-python-debug
    Fixed in 3.6.8-73.el8_10.alma.1
  • platform-python-devel
    Fixed in 3.6.8-73.el8_10.alma.1
  • python3-idle
    Fixed in 3.6.8-73.el8_10.alma.1
  • python3-libs
    Fixed in 3.6.8-73.el8_10.alma.1
  • python3-test
    Fixed in 3.6.8-73.el8_10.alma.1
  • python3-tkinter
    Fixed in 3.6.8-73.el8_10.alma.1
  • python3.11
    Fixed in 3.11.13-5.el8_10
  • python3.11-debug
    Fixed in 3.11.13-5.el8_10
  • python3.11-devel
    Fixed in 3.11.13-5.el8_10
  • python3.11-idle
    Fixed in 3.11.13-5.el8_10
  • python3.11-libs
    Fixed in 3.11.13-5.el8_10
  • python3.11-rpm-macros
    Fixed in 3.11.13-5.el8_10
  • python3.11-test
    Fixed in 3.11.13-5.el8_10
  • python3.11-tkinter
    Fixed in 3.11.13-5.el8_10
  • python3.12
    Fixed in 3.12.12-3.el8_10
  • python3.12-debug
    Fixed in 3.12.12-3.el8_10
  • python3.12-devel
    Fixed in 3.12.12-3.el8_10
  • python3.12-idle
    Fixed in 3.12.12-3.el8_10
  • python3.12-libs
    Fixed in 3.12.12-3.el8_10
  • python3.12-rpm-macros
    Fixed in 3.12.12-3.el8_10
  • python3.12-test
    Fixed in 3.12.12-3.el8_10
  • python3.12-tkinter
    Fixed in 3.12.12-3.el8_10

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • python-unversioned-command
    Fixed in 3.9.25-3.el9_7.1
  • python3
    Fixed in 3.9.25-3.el9_7.1
  • python3-debug
    Fixed in 3.9.25-3.el9_7.1
  • python3-devel
    Fixed in 3.9.25-3.el9_7.1
  • python3-idle
    Fixed in 3.9.25-3.el9_7.1
  • python3-libs
    Fixed in 3.9.25-3.el9_7.1
  • python3-test
    Fixed in 3.9.25-3.el9_7.1
  • python3-tkinter
    Fixed in 3.9.25-3.el9_7.1
  • python3.11
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-debug
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-devel
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-idle
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-libs
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-test
    Fixed in 3.11.13-5.1.el9_7
  • python3.11-tkinter
    Fixed in 3.11.13-5.1.el9_7
  • python3.12
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-debug
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-devel
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-idle
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-libs
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-test
    Fixed in 3.12.12-4.el9_7.1
  • python3.12-tkinter
    Fixed in 3.12.12-4.el9_7.1

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 10

  • python-unversioned-command
    Fixed in 3.12.12-3.el10_1.1

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • pypy3
    No fix yet
  • python3.11
    Fixed in 3.11.2-6+deb12u7

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • pypy3
    No fix yet
  • python3.13
    Fixed in 3.13.5-2+deb13u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • pypy3
    Fixed in 7.3.21+dfsg-1
  • python3.13
    Fixed in 3.13.12-1
  • python3.14
    Fixed in 3.14.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • pypy3
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • pypy3
    No fix yet
  • python3.10
    Fixed in 3.10.12-1~22.04.16

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • pypy3
    No fix yet
  • python3.12
    Fixed in 3.12.3-1ubuntu0.15

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 25.10

  • pypy3
    No fix yet
  • python3.13
    No fix yet
  • python3.14
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • pypy3
    No fix yet
  • python3.14
    Fixed in 3.14.3-1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.10

  • pypy3
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • python2.7
    No fix yet
  • python3.4
    No fix yet
  • python3.5
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • python2.7
    No fix yet
  • python3.5
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • python2.7
    No fix yet
  • python3.6
    No fix yet
  • python3.7
    No fix yet
  • python3.8
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • python2.7
    No fix yet
  • python3.8
    No fix yet
  • python3.9
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 22.04 LTS

  • python2.7
    No fix yet
  • python3.11
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.