6

CVE-2026-0672: Header injection in http.cookies.Morsel

Deferred
AliasesUBUNTU-CVE-2026-0672DEBIAN-CVE-2026-0672CGA-2hf2-rc2c-xw6q
Published 20-01-2026Last modified 03-03-2026

Vulnerability summary

CVE-2026-0672 is a medium (CVSS 6.0) vulnerability in python software foundation cpython. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 41.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.0/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.48%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 32 · Related 30
DLA-4455-1MGASA-2026-0455OPENSUSE-SU-2026:10126-1OPENSUSE-SU-2026:10200-1OPENSUSE-SU-2026:10206-1OPENSUSE-SU-2026:10221-1

Timeline

  1. 20-01-2026
    PublishedVulnerability first disclosed.
  2. 03-03-2026
    Last modifiedVulnerability 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

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.47% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu12 products
  • python2.7< 2.7.6-8ubuntu0.6+esm29 | < 2.7.12-1ubuntu0~16.04.18+esm19 | < 2.7.17-1~18.04ubuntu1.13+esm14 | < 2.7.18-13ubuntu1.5+esm8
  • python3.10< 3.10.12-1~22.04.14
  • python3.11< 3.11.0~rc1-1~22.04.1~esm8
  • python3.12< 3.12.3-1ubuntu0.11
  • python3.13< 3.13.7-1ubuntu0.3
Chainguard6 products
  • python-3.10< 3.10.19-r4
  • python-3.11< 3.11.14-r5
  • python-3.12< 3.12.12-r5
  • python-3.13< 3.13.12-r1
  • python-3.14< 3.14.3-r1
Wolfi5 products
  • python-3.10< 3.10.19-r4
  • python-3.11< 3.11.14-r5
  • python-3.12< 3.12.12-r5
  • python-3.13< 3.13.12-r1
  • python-3.14< 3.14.3-r1
Debian4 products
  • pypy3All versions (No fix recorded) | < 7.3.21+dfsg-1
  • python3.11< 3.11.2-6+deb12u7
  • python3.13< 3.13.12-1 | < 3.13.5-2+deb13u1
  • python3.14< 3.14.3-1
Opensuse1 product
  • python-M2Crypto&distro=openSUSE Tumbleweed< 0.48.0-1.1
Python software foundation1 product
  • cpython< 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

6 vendors · 29 products

References

19 links
Show all 19 references