CVE-2026-0672

Aliases:DEBIAN-CVE-2026-0672CGA-2hf2-rc2c-xw6qCGA-38cc-g4pg-4r49CGA-6fw2-r724-96qvCGA-8hp9-5qj7-x26rCGA-995q-cfgv-6rjfCGA-hcc9-67p7-8ghvCGA-mcgp-8rgp-5j3cCGA-f395-xqmm-c9cjCGA-q7m9-fp8m-7hw9CGA-qq84-mwmm-6679CGA-rxwp-q75g-pp36CGA-wvjx-g96c-rvc9
Advisory lineage Upstream: 0 Downstream: 35
Deferred
Published: 20 Jan 2026, 21:52
Last modified:03 Mar 2026, 14:43

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
6 MEDIUM
v4.0 (cve.org)
EPSS Score
0.47% LOW
0% probability +0.31%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

20 Jan 2026, 21:52
Published
Vulnerability first disclosed
03 Mar 2026, 14:43
Last Modified
Vulnerability information updated

Description

When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.

CVSS Metrics

  • v4.0•MEDIUM•Score: 6CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
  • v4.0•MEDIUM•Score: 6CVSS: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

EPSS Trends

Current EPSS score: 0.47%• Percentile: 40%

Techniques & Countermeasures

  • 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.

Affected Systems

  • chainguard•python-3.10

    < 3.10.19-r4

  • chainguard•python-3.11

    < 3.11.14-r5

  • chainguard•python-3.12

    < 3.12.12-r5

  • chainguard•python-3.13

    < 3.13.12-r1

  • chainguard•python-3.14

    < 3.14.3-r1

  • chainguard•python-3.9

    all

  • wolfi•python-3.10

    < 3.10.19-r4

  • wolfi•python-3.11

    < 3.11.14-r5

  • wolfi•python-3.12

    < 3.12.12-r5

  • wolfi•python-3.13

    < 3.13.12-r1

  • wolfi•python-3.14

    < 3.14.3-r1

  • debian•pypy3

    all | all | all | < 7.3.21+dfsg-1

  • debian•python3.11

    < 3.11.2-6+deb12u7

  • debian•python3.13

    < 3.13.5-2+deb13u1 | < 3.13.12-1

  • debian•python3.14

    < 3.14.3-1

  • debian•python3.9

    < 3.9.2-1+deb11u7

  • python software foundation•cpython

    < 3.15.0 | ≥ 3.15.0a1, < 3.15.0 | < 3.13.12 | < 3.10.20 | ≥ 3.11.0, < 3.11.15 | ≥ 3.12.0, < 3.12.13 | ≥ 3.13.0, < 3.13.12 | ≥ 3.14.0, < 3.14.3 | ≥ 3.15.0a1, < 3.15.0a6

References (13)