CVE-2026-71290

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH 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%CVSS: 9.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
9.1(high)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 17, 2026

Advisory Details (1)

Auto-updated Aug 12, 2026
No patch confirmed yet.
generic
https://lists.apache.org/thread/bhf7g2zwpom2ohvwjjjlonc93br2s8vq

Vendor Advisories for CVE-2026-71290(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 57× in last 7d / 80× 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.

  1. 2026-08-21 03:50 UTCGHSA enrichment
  2. 2026-08-20 23:49 UTCEG score recompute
  3. 2026-08-20 23:48 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 19:47 UTCGHSA enrichment
  6. 2026-08-20 15:46 UTCGHSA enrichment
  7. 2026-08-20 11:45 UTCGHSA enrichment
  8. 2026-08-20 07:41 UTCGHSA enrichment
  9. 2026-08-20 03:40 UTCGHSA enrichment
  10. 2026-08-19 23:39 UTCGHSA enrichment
  11. 2026-08-19 19:36 UTCEG score recompute
  12. 2026-08-19 19:36 UTCGHSA enrichment
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 15:34 UTCGHSA enrichment
  15. 2026-08-19 11:26 UTCGHSA enrichment
  16. 2026-08-19 07:24 UTCGHSA enrichment
  17. 2026-08-19 03:23 UTCGHSA enrichment
  18. 2026-08-18 23:21 UTCGHSA enrichment
  19. 2026-08-18 19:20 UTCGHSA enrichment
  20. 2026-08-18 15:18 UTCEG score recompute
  21. 2026-08-18 15:18 UTCGHSA enrichment
  22. 2026-08-18 13:49 UTCEPSS rescore
  23. 2026-08-18 13:49 UTCEPSS rescore
  24. 2026-08-18 11:17 UTCGHSA enrichment
  25. 2026-08-18 07:16 UTCGHSA enrichment
Show 55 more
  1. 2026-08-18 03:14 UTCGHSA enrichment
  2. 2026-08-17 23:10 UTCGHSA enrichment
  3. 2026-08-17 19:08 UTCGHSA enrichment
  4. 2026-08-17 14:04 UTCEG score recompute
  5. 2026-08-17 14:04 UTCGHSA enrichment
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-17 10:03 UTCGHSA enrichment
  8. 2026-08-17 06:02 UTCGHSA enrichment
  9. 2026-08-17 01:59 UTCGHSA enrichment
  10. 2026-08-16 21:58 UTCGHSA enrichment
  11. 2026-08-16 17:57 UTCEG score recompute
  12. 2026-08-16 17:57 UTCGHSA enrichment
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 13:56 UTCGHSA enrichment
  16. 2026-08-16 09:54 UTCGHSA enrichment
  17. 2026-08-16 05:53 UTCEG score recompute
  18. 2026-08-16 05:53 UTCGHSA enrichment
  19. 2026-08-16 02:15 UTCEPSS rescore
  20. 2026-08-16 01:53 UTCGHSA enrichment
  21. 2026-08-15 21:52 UTCGHSA enrichment
  22. 2026-08-15 17:51 UTCGHSA enrichment
  23. 2026-08-15 13:50 UTCGHSA enrichment
  24. 2026-08-15 09:49 UTCGHSA enrichment
  25. 2026-08-15 05:48 UTCGHSA enrichment
  26. 2026-08-15 01:46 UTCEG score recompute
  27. 2026-08-15 01:46 UTCGHSA enrichment
  28. 2026-08-15 01:31 UTCEPSS rescore
  29. 2026-08-14 21:46 UTCGHSA enrichment
  30. 2026-08-14 17:45 UTCGHSA enrichment
  31. 2026-08-14 13:33 UTCGHSA enrichment
  32. 2026-08-14 09:32 UTCGHSA enrichment
  33. 2026-08-14 05:31 UTCGHSA enrichment
  34. 2026-08-14 01:30 UTCEG score recompute
  35. 2026-08-14 01:30 UTCGHSA enrichment
  36. 2026-08-13 22:00 UTCEPSS rescore
  37. 2026-08-13 21:29 UTCGHSA enrichment
  38. 2026-08-13 17:28 UTCGHSA enrichment
  39. 2026-08-13 16:38 UTCGHSA enrichment
  40. 2026-08-13 14:29 UTCGHSA enrichment
  41. 2026-08-13 10:28 UTCGHSA enrichment
  42. 2026-08-13 09:47 UTCGHSA enrichment
  43. 2026-08-13 09:04 UTCGHSA enrichment
  44. 2026-08-13 05:03 UTCGHSA enrichment
  45. 2026-08-13 01:03 UTCEG score recompute
  46. 2026-08-13 01:03 UTCGHSA enrichment
  47. 2026-08-12 21:02 UTCGHSA enrichment
  48. 2026-08-12 20:21 UTCGHSA enrichment
  49. 2026-08-12 19:46 UTCEG score recompute▲ 9.10
  50. 2026-08-12 19:46 UTCGHSA enrichment
  51. 2026-08-12 19:45 UTCMITRE cvelistV5CVSS v3 → 9.1 · severity → CRITICAL
  52. 2026-08-12 13:51 UTCEPSS rescore
  53. 2026-08-11 21:18 UTCNVD update
  54. 2026-08-11 20:45 UTCEG score recompute
  55. 2026-08-11 20:45 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 in the National Vulnerability Database on August 11, 2026, with the most recent update on August 17, 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% probability of exploitation in the next 30 days, which ranks it in the top 91.4% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71290, 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

Explore the affected products and dependency analysis for CVE-2026-71290

Explore →

Is Your Infrastructure Affected by CVE-2026-71290?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs