CVE-2026-0672

MEDIUMNVD 6.06.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 6.0 under NVD CVSS v3. EPSS exploit probability: 0.5% (39th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
6.0EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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 v3
6.0
EG Score
6.0MEDIUMmedium confidence
EG Risk
27
EG Risk 27/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity60% × 45%
The EG Score, 6.0 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

January 20, 2026

Last Modified

June 17, 2026

Advisory Details (9)

Auto-updated Aug 8, 2026
Patch available. Sources: github_pr, github_commit.
Web page

Mailman 3 [CVE-2026-0672] Header injection in http.cookies.Morsel - Security-announce - python.org

https://mail.python.org/archives/list/[email protected]/thread/6VFLQQEIX673KXKFUZXCUNE5AZOGZ45M/
GitHub pull request

gh-143919: Reject control characters in http cookies

Fix merged in python/cpython PR #143920 on 2026-01-20 — awaiting tagged release

https://github.com/python/cpython/pull/143920
Web page

Reject control characters in http.cookies.Morsel · Issue #143919 · python/cpython · GitHub

https://github.com/python/cpython/issues/143919
GitHub commit

commit b1869ff648bb (python/cpython)

Fix landed in python/cpython commit b1869ff648bb — awaiting tagged release

https://github.com/python/cpython/commit/b1869ff648bbee0717221d09e6deff46617f3e85
GitHub commit

commit 95746b3a13a9 (python/cpython)

Fix landed in python/cpython commit 95746b3a13a9 — awaiting tagged release

https://github.com/python/cpython/commit/95746b3a13a985787ef53b977129041971ed7f70
GitHub commit

commit 918387e4912d (python/cpython)

Fix landed in python/cpython commit 918387e4912d — awaiting tagged release

https://github.com/python/cpython/commit/918387e4912d12ffc166c8f2a38df92b6ec756ca
GitHub commit

commit 7852d72b653f (python/cpython)

Fix landed in python/cpython commit 7852d72b653f — awaiting tagged release

https://github.com/python/cpython/commit/7852d72b653fea0199acf5fc2a84f6f8b84eba8d
GitHub commit

commit 712452e6f1d4 (python/cpython)

Fix landed in python/cpython commit 712452e6f1d4 — awaiting tagged release

https://github.com/python/cpython/commit/712452e6f1d4b9f7f8c4c92ebfcaac1705faa440
GitHub commit

commit 62700107418e (python/cpython)

Fix landed in python/cpython commit 62700107418e — awaiting tagged release

https://github.com/python/cpython/commit/62700107418eb2cca3fc88da036a243ea975f172

Vendor Advisories for CVE-2026-0672(5)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3.11-venv (3.11.0~rc1-1~22.04.1~esm8) @ jammy2026-06-08ubuntu
ubuntupython2.7-minimal (2.7.12-1ubuntu0~16.04.18+esm19) @ xenial2026-06-08ubuntu
redhatrhui5/rhua-rhel9:17797982222026-05-27redhat
redhatpython3.12-0:3.12.13-2.el10_22026-05-19redhat
redhatpython3.12-0:3.12.13-2.el9_82026-05-19redhat
redhatpython3.12-0:3.12.13-2.el8_102026-04-27redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 4 ecosystems)
Debian:14(3)
PackageVulnerable rangeFix by version rangeDependents
pypy37.3.19+dfsg-2, 7.3.20+dfsg-1, 7.3.20+dfsg-2, 7.3.20+dfsg-3, 7.3.20+dfsg-4
  • every version up to 7.3.21+dfsg-1: fixed in 7.3.21+dfsg-1
—
python3.133.13.11-1 ... 3.13.9-1 (6 versions)
  • every version up to 3.13.12-1: fixed in 3.13.12-1
—
python3.143.14.0-1 ... 3.14.2-1 (14 versions)
  • every version up to 3.14.3-1: fixed in 3.14.3-1
—
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
pypy37.3.10+dfsg-1 ... 7.3.9+dfsg-5 (53 versions)
  • every version on: no fix on record
—
python3.93.9.2-1, 3.9.2-1+deb11u1, 3.9.2-1+deb11u2, 3.9.2-1+deb11u3, 3.9.2-1+deb11u4
  • every version up to 3.9.2-1+deb11u5: fixed in 3.9.2-1+deb11u5
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
pypy37.3.11+dfsg-2 ... 8.0.0+dfsg-1 (31 versions)
  • every version on: no fix on record
—
python3.113.11.2-6 ... 3.11.2-6+deb12u6 (7 versions)
  • every version up to 3.11.2-6+deb12u7: fixed in 3.11.2-6+deb12u7
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
pypy37.3.19+dfsg-2 ... 8.0.0+dfsg-1 (13 versions)
  • every version on: no fix on record
—
python3.133.13.5-2
  • every version up to 3.13.5-2+deb13u1: fixed in 3.13.5-2+deb13u1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 28× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 197 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 98 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  4. 2026-10-12 16:42 UTCEG score recompute
  5. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  6. 2026-10-11 20:17 UTCEG score recompute
  7. 2026-10-11 18:29 UTCEG score recompute
  8. 2026-10-11 15:03 UTCEG score recompute
  9. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  10. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  11. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  12. 2026-10-08 20:28 UTCOSV refresh
  13. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  14. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  15. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  16. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  17. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  19. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  21. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  22. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  23. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  24. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 39th percentile
Show 74 more
  1. 2026-09-19 03:00 UTCOSV refresh
  2. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  4. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  7. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  8. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  9. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  10. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  11. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  12. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  13. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  14. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  15. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  16. 2026-08-31 06:19 UTCOSV refresh
  17. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  18. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  19. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  20. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  22. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  23. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  24. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  25. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  26. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  27. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  28. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  29. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  30. 2026-08-14 13:25 UTCEG score recompute
  31. 2026-08-14 13:25 UTCVendor advisory
  32. 2026-08-14 13:25 UTCGHSA enrichmentGHSA-x85f-j5v8-5vrv
  33. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  34. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  35. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  36. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  37. 2026-08-09 19:07 UTCEG score recompute
  38. 2026-08-09 19:07 UTCVendor advisory
  39. 2026-08-09 19:07 UTCGHSA enrichmentGHSA-x85f-j5v8-5vrv
  40. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  41. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  42. 2026-08-08 00:09 UTCEG score recompute
  43. 2026-08-08 00:09 UTCVendor advisory
  44. 2026-08-08 00:09 UTCGHSA enrichmentGHSA-x85f-j5v8-5vrv
  45. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  46. 2026-08-06 05:24 UTCEG score recompute
  47. 2026-08-06 05:24 UTCVendor advisory
  48. 2026-08-06 05:24 UTCGHSA enrichmentGHSA-x85f-j5v8-5vrv
  49. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  50. 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  51. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  52. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  53. 2026-08-02 22:44 UTCEG score recompute
  54. 2026-08-02 22:44 UTCVendor advisory
  55. 2026-08-02 22:44 UTCGHSA enrichmentGHSA-x85f-j5v8-5vrv
  56. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  57. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  58. 2026-07-31 21:42 UTCOSV refresh
  59. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  60. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  61. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  62. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  63. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  64. 2026-07-25 14:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  65. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  66. 2026-07-23 03:04 UTCEG score recompute
  67. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  68. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  69. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  70. 2026-07-19 14:30 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  71. 2026-07-19 02:28 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  72. 2026-07-18 10:04 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  73. 2026-07-16 17:02 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  74. 2026-07-15 16:57 UTCEPSS rescoreEPSS 0.4% · 32nd percentile

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-0672?
CVE-2026-0672 is a medium-severity vulnerability; its CVE record was published on January 20, 2026. 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.
When was the CVE record for CVE-2026-0672 published?
The CVE record for CVE-2026-0672 was published on January 20, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-0672 actively exploited?
CVE-2026-0672 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-0672?
CVE-2026-0672 has a CVSS v3 base score of 6.0 (NVD).
How do I remediate CVE-2026-0672?
A fix for CVE-2026-0672 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-0672 are linked in the Vendor Advisories panel on this page.

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