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
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

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
6.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

June 30, 2026

Last Modified

July 2, 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
github Patch Available

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 rangeFixed inDependents
hono—4.10.3—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 44× 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 172 total refreshes for this CVE.

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

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 in the National Vulnerability Database on June 30, 2026, with the most recent update on July 2, 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% probability of exploitation in the next 30 days, which ranks it in the top 78.0% of all scored CVEs.
What is the CVSS score of CVE-2025-71381?
CVE-2025-71381 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2025-71381?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-71381, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-71381

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