CVE-2026-44431

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 74% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

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
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.3%
EPSS %ILE
25th
KEV
Not listed

Published

May 13, 2026

Last Modified

June 26, 2026

Advisory Details (1)

Auto-updated May 13, 2026
Patch available. Sources: github.
github Patch Available

Sensitive headers forwarded across origins in proxied low-level redirects · Advisory · urllib3/urllib3 · GitHub

https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvc

Vendor Advisories for CVE-2026-44431(20)

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

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatmta/mta-rhel9-operator:17864814812026-08-18redhat
redhatresource-agents-0:4.9.0-54.el8_10.362026-08-12redhat
redhatresource-agents-0:4.9.0-40.el8_8.202026-08-12redhat
redhatsatellite/iop-vulnerability-engine-rhel9:17845541232026-08-06redhat
redhatfence-agents-0:4.2.1-65.el8_4.312026-08-06redhat
redhatfence-agents-0:4.2.1-112.el8_8.202026-08-06redhat
redhatsatellite/iop-advisor-backend-rhel9:17845582592026-08-06redhat
redhatfence-agents-0:4.2.1-89.el8_6.252026-08-06redhat
redhatsatellite/iop-advisor-backend-rhel9:17845582562026-08-06redhat
redhatfence-agents-0:4.2.1-129.el8_10.282026-08-04redhat
redhatresource-agents-0:4.1.1-90.el8_4.262026-07-28redhat
redhatresource-agents-0:4.9.0-16.el8_6.232026-07-28redhat
redhatsatellite/iop-advisor-engine-rhel9:17848344022026-07-23redhat
redhatrhui5/rhua-rhel9:17847950762026-07-23redhat
redhatmta/mta-solution-server-rhel9:17841098832026-07-21redhat
redhatrhoai/odh-vllm-rocm-rhel9:17839988572026-07-21redhat
redhatansible-automation-platform-25/hub-rhel8:17840505982026-07-20redhat
redhatansible-automation-platform-tech-preview/metrics-service-rhel9:17839691392026-07-20redhat
redhatmariadb11-8-main-11.8.8-3.hum12026-07-09redhat
redhatrhoai/odh-trustyai-nemo-guardrails-server-rhel9:17824716062026-07-09redhat
redhatpython-urllib3-0:1.24.2-10.el8_102026-07-08redhat
redhatsatellite/foreman-mcp-server-rhel9:17827393442026-07-07redhat
redhatpython3.12-urllib3-0:2.7.0-1.el9ap2026-07-01redhat
redhatsatellite/iop-insights-engine-rhel9:17824484552026-07-01redhat
redhatpython-rpds-py-main-2026.6.3-1.hum12026-07-01redhat
redhatsatellite/iop-vmaas-rhel9:17821396192026-07-01redhat
redhatansible-automation-platform-26/lightspeed-chatbot-rhel9:17826507472026-07-01redhat
redhatsatellite/iop-yuptoo-rhel9:17823804822026-07-01redhat
redhatsatellite/iop-puptoo-rhel9:17803934512026-07-01redhat
redhatsatellite/iop-host-inventory-rhel9:17804030262026-07-01redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
python-urllib31.26.5-1~exp1, 1.26.5-1~exp1+deb11u1, 1.26.5-1~exp1+deb11u2, 1.26.5-1~exp1+deb11u3
  • every version up to 1.26.5-1~exp1+deb11u4: fixed in 1.26.5-1~exp1+deb11u4
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
python-urllib31.26.12-1, 1.26.12-1+deb12u1, 1.26.12-1+deb12u2, 1.26.12-1+deb12u3
  • every version up to 1.26.12-1+deb12u4: fixed in 1.26.12-1+deb12u4
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
python-urllib32.3.0-3, 2.3.0-3+deb13u1
  • every version up to 2.3.0-3+deb13u2: fixed in 2.3.0-3+deb13u2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
python-urllib32.3.0-3 ... 2.6.3-2 (6 versions)
  • every version up to 2.7.0-1: fixed in 2.7.0-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
urllib31.23 ... 2.6.3 (62 versions)
  • 1.23 up to 2.7.0: fixed in 2.7.0
—

Weakness Classification(1)

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

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 5× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 197 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-03 14:25 UTCEPSS rescore
  3. 2026-10-01 19:50 UTCEPSS rescore
  4. 2026-09-30 15:03 UTCEPSS rescore
  5. 2026-09-30 05:58 UTCOSV refresh
  6. 2026-09-27 13:48 UTCEPSS rescore
  7. 2026-09-26 15:58 UTCEPSS rescore
  8. 2026-09-23 17:53 UTCEPSS rescore
  9. 2026-09-20 20:15 UTCEPSS rescore
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-17 19:31 UTCEPSS rescore
  12. 2026-09-16 14:08 UTCEPSS rescore
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-13 16:47 UTCEPSS rescore
  15. 2026-09-12 15:01 UTCEPSS rescore
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 09:53 UTCOSV refresh
  18. 2026-09-11 09:37 UTCEPSS rescore
  19. 2026-09-10 09:34 UTCEPSS rescore
  20. 2026-09-08 22:00 UTCEPSS rescore
  21. 2026-09-07 16:01 UTCEPSS rescore
  22. 2026-09-06 13:47 UTCEPSS rescore
  23. 2026-09-04 05:06 UTCEPSS rescore
  24. 2026-09-02 14:12 UTCEPSS rescore
  25. 2026-09-01 13:54 UTCEPSS rescore
Show 75 more
  1. 2026-08-30 19:17 UTCEPSS rescore
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-27 14:25 UTCEPSS rescore
  5. 2026-08-26 14:46 UTCEPSS rescore
  6. 2026-08-25 13:49 UTCEPSS rescore
  7. 2026-08-23 17:53 UTCEG score recompute
  8. 2026-08-23 17:53 UTCVendor advisory
  9. 2026-08-23 00:19 UTCEPSS rescore
  10. 2026-08-21 23:49 UTCEPSS rescore
  11. 2026-08-20 22:55 UTCEPSS rescore
  12. 2026-08-20 20:58 UTCEG score recompute
  13. 2026-08-20 20:58 UTCVendor advisory
  14. 2026-08-19 17:04 UTCEPSS rescore
  15. 2026-08-18 13:48 UTCEPSS rescore
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 10:40 UTCEG score recompute
  18. 2026-08-17 10:40 UTCVendor advisory
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 04:04 UTCEG score recompute
  21. 2026-08-16 04:04 UTCVendor advisory
  22. 2026-08-16 02:14 UTCEPSS rescore
  23. 2026-08-15 01:30 UTCEPSS rescore
  24. 2026-08-15 00:20 UTCVendor advisory
  25. 2026-08-14 02:33 UTCEG score recompute
  26. 2026-08-14 02:33 UTCVendor advisory
  27. 2026-08-13 22:00 UTCEPSS rescore
  28. 2026-08-12 20:44 UTCEG score recompute
  29. 2026-08-12 20:44 UTCVendor advisory
  30. 2026-08-12 13:51 UTCEPSS rescore
  31. 2026-08-11 22:57 UTCEG score recompute
  32. 2026-08-11 22:57 UTCVendor advisory
  33. 2026-08-11 13:43 UTCEPSS rescore
  34. 2026-08-11 00:57 UTCEG score recompute
  35. 2026-08-11 00:57 UTCVendor advisory
  36. 2026-08-11 00:00 UTCEPSS rescore
  37. 2026-08-09 23:43 UTCEG score recompute
  38. 2026-08-09 23:43 UTCVendor advisory
  39. 2026-08-09 13:46 UTCEPSS rescore
  40. 2026-08-09 01:55 UTCEG score recompute
  41. 2026-08-09 01:55 UTCVendor advisory
  42. 2026-08-08 16:37 UTCEPSS rescore
  43. 2026-08-07 17:17 UTCEG score recompute
  44. 2026-08-07 17:17 UTCVendor advisory
  45. 2026-08-06 19:29 UTCEG score recompute
  46. 2026-08-06 19:29 UTCVendor advisory
  47. 2026-08-06 13:46 UTCEPSS rescore
  48. 2026-08-05 21:41 UTCEG score recompute
  49. 2026-08-05 21:41 UTCVendor advisory
  50. 2026-08-05 19:17 UTCEPSS rescore
  51. 2026-08-04 15:10 UTCEPSS rescore
  52. 2026-08-04 10:38 UTCEPSS rescore
  53. 2026-08-03 19:09 UTCVendor advisory
  54. 2026-08-02 17:50 UTCEG score recompute
  55. 2026-08-02 17:50 UTCVendor advisory
  56. 2026-08-02 02:27 UTCEPSS rescore
  57. 2026-08-01 20:02 UTCEG score recompute
  58. 2026-08-01 20:02 UTCVendor advisory
  59. 2026-08-01 04:16 UTCEPSS rescore
  60. 2026-07-30 16:28 UTCEPSS rescore
  61. 2026-07-30 01:30 UTCEPSS rescore
  62. 2026-07-28 15:36 UTCEPSS rescore
  63. 2026-07-27 14:13 UTCEPSS rescore
  64. 2026-07-26 14:54 UTCEPSS rescore
  65. 2026-07-26 14:54 UTCEPSS rescore
  66. 2026-07-25 14:18 UTCEPSS rescore
  67. 2026-07-24 14:17 UTCEPSS rescore
  68. 2026-07-23 14:18 UTCEPSS rescore
  69. 2026-07-23 03:15 UTCEG score recompute
  70. 2026-07-22 14:08 UTCEPSS rescore
  71. 2026-07-21 15:24 UTCEPSS rescore
  72. 2026-07-20 17:08 UTCEPSS rescore
  73. 2026-07-19 14:31 UTCEPSS rescore
  74. 2026-07-19 02:29 UTCEPSS rescore
  75. 2026-07-18 10:04 UTCEPSS rescore

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

Frequently asked(5)

What is CVE-2026-44431?
CVE-2026-44431 is a medium vulnerability published on May 13, 2026. urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connectionfromurl().urlopen(..., assertsamehost=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0.
When was CVE-2026-44431 disclosed?
CVE-2026-44431 was first published on May 13, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44431 actively exploited?
CVE-2026-44431 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44431?
CVE-2026-44431 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-44431?
A fix for CVE-2026-44431 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-44431 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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