CVE-2025-71381

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-07-01. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Hono before 4.10.2 (fixed in 4.10.3) contains a flaw in its CORS middleware: when the origin is not set to "*", the middleware copies the Vary header from the incoming request into the response. Because Vary is a response header that should be managed by the server, an attacker can supply arbitrary Vary values that are reflected into the response, potentially causing cache key pollution and inconsistent CORS enforcement in environments that rely on shared caches or proxies.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
34
EG Risk 34/100CISA 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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or 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
19th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or 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 (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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

June 30, 2026

Last Modified

October 5, 2026

Advisory Details (2)

Auto-updated Jul 1, 2026
Patch available. Sources: github.
generic

Hono - Vary Header Injection in CORS Middleware | Advisories | VulnCheck

https://www.vulncheck.com/advisories/hono-vary-header-injection-in-cors-middleware
githubMentions a patch (unverified)

Vary Header Injection leading to potential CORS Bypass · Advisory · honojs/hono · GitHub

https://github.com/honojs/hono/security/advisories/GHSA-q7jf-gf43-6x6p

Vendor Advisories for CVE-2025-71381(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
hono—
  • every version up to 4.10.3: fixed in 4.10.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 32× 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 191 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2025-71381?
CVE-2025-71381 is a medium vulnerability published on June 30, 2026. Hono before 4.10.2 (fixed in 4.10.3) contains a flaw in its CORS middleware: when the origin is not set to "*", the middleware copies the Vary header from the incoming request into the response. Because Vary is a response header that should be managed by the server, an attacker can supply arbitrary…
When was CVE-2025-71381 disclosed?
CVE-2025-71381 was first published on June 30, 2026, with the most recent update on October 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-71381 actively exploited?
CVE-2025-71381 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-71381?
CVE-2025-71381 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-71381?
A fix for CVE-2025-71381 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-71381 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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