CVE-2026-71290

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-11. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper TLS hostname verification vulnerability in Apache HttpComponents Client 5.4 or newer. HostnameVerificationPolicy#BUILTIN setting has no effect when used with the async version of HttpClient. An attacker that can intercept and modify traffic between the client and the server can impersonate the server by presenting a valid certificate for a different domain. 

Please note the classic version of HttpClient is not affected by this vulnerability. 

Affected users are recommended to upgrade to at least version 5.6.4, which fixes the issue.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
56
EG Risk 56/100CISA SSVC

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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
23rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 11, 2026

Last Modified

September 24, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
Patch available.
generic

oss-security - CVE-2026-71290: Apache HttpComponents Client: TLS hostname verification silently disabled on the async transport (default config, MITM)

http://www.openwall.com/lists/oss-security/2026/08/13/6
generic
https://lists.apache.org/thread/bhf7g2zwpom2ohvwjjjlonc93br2s8vq

Vendor Advisories for CVE-2026-71290(2)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatcamel-quarkus-support-httpclient52026-09-03redhat

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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
httpcomponents-core55.2.2-1 ... 5.4.3-1 (7 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 195× 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 383 total refreshes for this CVE.

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

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

Same product

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Debian:14:httpcomponents-core5

Frequently asked(5)

What is CVE-2026-71290?
CVE-2026-71290 is a critical vulnerability published on August 11, 2026. Improper TLS hostname verification vulnerability in Apache HttpComponents Client 5.4 or newer. HostnameVerificationPolicy#BUILTIN setting has no effect when used with the async version of HttpClient. An attacker that can intercept and modify traffic between the client and the server can impersonate…
When was CVE-2026-71290 disclosed?
CVE-2026-71290 was first published on August 11, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71290 actively exploited?
CVE-2026-71290 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-71290?
CVE-2026-71290 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-71290?
A fix for CVE-2026-71290 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-71290 are linked in the Vendor Advisories panel on this page.

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