synced 10 MIN AGO
01 Record

CVE-2026-6019

BaseCookie.js_output() does not neutralize embedded characters

LowPUBLISHEDCNA: PSF
CNA base score2.1 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
View raw JSON

02 Description

BaseCookie.js_output() does not neutralize embedded characters

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
0.21% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 11.2% of scored records. A rank, not a probability.
NVD base score
2.1 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
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
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-26.
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
2026-04-22 19:28Z6 MO AGO
Last updated
2026-06-10 18:58Z4 MO AGO
Reserved
2026-04-09
Assigning CNA
PSF
Record state
PUBLISHED
Severity
Low (CVSS 2.1)
CNA CVSS vector
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
Weaknesses
  • CWE-150Improper Neutralization of Escape, Meta, or Control SequencesVariant
  • CWE-116Improper Encoding or Escaping of OutputClass
  • CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
Data version
5.2
Document digest
50628025a760a271eaab32bf0ac424ffb94aa360ca26e5c6b390b2935eb9612b

05 Affected products

VendorProductVersionsPlatforms
Python Software FoundationCPython0 to < 3.13.14, 3.14.0a1 to < 3.14.5rc1, 3.15.0a1 to < 3.15.0b1—

06 References

07 Fixed in

AlmaLinux 9

  • python3.14
    Fixed in 3.14.5-1.el9_8
  • python3.14-debug
    Fixed in 3.14.5-1.el9_8
  • python3.14-devel
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-debug
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-devel
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-idle
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-libs
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-test
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-tkinter
    Fixed in 3.14.5-1.el9_8
  • python3.14-idle
    Fixed in 3.14.5-1.el9_8
  • python3.14-libs
    Fixed in 3.14.5-1.el9_8
  • python3.14-test
    Fixed in 3.14.5-1.el9_8
  • python3.14-tkinter
    Fixed in 3.14.5-1.el9_8

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

AlmaLinux 10

  • python3.14
    Fixed in 3.14.5-1.el10_2
  • python3.14-debug
    Fixed in 3.14.5-1.el10_2
  • python3.14-devel
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-debug
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-devel
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-idle
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-libs
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-test
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-tkinter
    Fixed in 3.14.5-1.el10_2
  • python3.14-idle
    Fixed in 3.14.5-1.el10_2
  • python3.14-libs
    Fixed in 3.14.5-1.el10_2
  • python3.14-test
    Fixed in 3.14.5-1.el10_2
  • python3.14-tkinter
    Fixed in 3.14.5-1.el10_2

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

CloudLinux 9

  • python3.14
    Fixed in 3.14.5-1.el9_8
  • python3.14-debug
    Fixed in 3.14.5-1.el9_8
  • python3.14-devel
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-debug
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-devel
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-idle
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-libs
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-test
    Fixed in 3.14.5-1.el9_8
  • python3.14-freethreading-tkinter
    Fixed in 3.14.5-1.el9_8
  • python3.14-idle
    Fixed in 3.14.5-1.el9_8
  • python3.14-libs
    Fixed in 3.14.5-1.el9_8
  • python3.14-test
    Fixed in 3.14.5-1.el9_8
  • python3.14-tkinter
    Fixed in 3.14.5-1.el9_8

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

  • python3.14
    Fixed in 3.14.5-1.el10_2
  • python3.14-debug
    Fixed in 3.14.5-1.el10_2
  • python3.14-devel
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-debug
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-devel
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-idle
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-libs
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-test
    Fixed in 3.14.5-1.el10_2
  • python3.14-freethreading-tkinter
    Fixed in 3.14.5-1.el10_2
  • python3.14-idle
    Fixed in 3.14.5-1.el10_2
  • python3.14-libs
    Fixed in 3.14.5-1.el10_2
  • python3.14-test
    Fixed in 3.14.5-1.el10_2
  • python3.14-tkinter
    Fixed in 3.14.5-1.el10_2

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+deb12u9

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+deb13u2

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

Debian 14

  • pypy3
    No fix yet
  • python3.13
    Fixed in 3.13.14-1
  • python3.14
    Fixed in 3.14.5~rc1-1

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 3.14.4-1ubuntu0.1

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
    Fixed in 2.7.6-8ubuntu0.6+esm30
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
  • python3.4
    Fixed in 3.4.3-1ubuntu1~14.04.7+esm21
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
  • python3.5
    Fixed in 3.5.2-2ubuntu0~16.04.4~14.04.1+esm11
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro

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
    Fixed in 2.7.12-1ubuntu0~16.04.18+esm22
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
  • python3.5
    Fixed in 3.5.2-2ubuntu0~16.04.13+esm25
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro

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
    Fixed in 2.7.17-1~18.04ubuntu1.13+esm15
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • python3.6
    Fixed in 3.6.9-1~18.04ubuntu1.13+esm10
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • python3.7
    Fixed in 3.7.5-2ubuntu1~18.04.2+esm11
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • python3.8
    Fixed in 3.8.0-3ubuntu1~18.04.2+esm11
    Available with Ubuntu Pro: https://ubuntu.com/pro

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

Ubuntu Pro 20.04 LTS

  • python3.8
    Fixed in 3.8.10-0ubuntu1~20.04.18+esm7
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • python3.9
    Fixed in 3.9.5-3ubuntu0~20.04.1+esm11
    Available with Ubuntu Pro: https://ubuntu.com/pro

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
    Fixed in 2.7.18-13ubuntu1.5+esm9
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • python3.11
    Fixed in 3.11.0~rc1-1~22.04.1+esm2
    Available with Ubuntu Pro: https://ubuntu.com/pro

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.