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
Trending — Patch released this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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
5.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
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 / EcosystemFixed in / 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 rangeFixed inDependents
python-urllib31.26.5-1~exp1, 1.26.5-1~exp1+deb11u1, 1.26.5-1~exp1+deb11u2, 1.26.5-1~exp1+deb11u31.26.5-1~exp1+deb11u4—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
python-urllib31.26.12-1, 1.26.12-1+deb12u1, 1.26.12-1+deb12u2, 1.26.12-1+deb12u31.26.12-1+deb12u4—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
python-urllib32.3.0-3, 2.3.0-3+deb13u12.3.0-3+deb13u2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
python-urllib32.3.0-3 ... 2.6.3-2 (6 versions)2.7.0-1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
urllib31.23 ... 2.6.3 (62 versions)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 14× in last 7d / 60× 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 162 total refreshes for this CVE.

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

Related CVEs(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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 73.8% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44431, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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