CVE-2026-56763

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory published 2026-07-11. a secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: None knownExposed: 0

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

Hono before 4.12.7 allows __proto__ key in parseBody with dot option enabled, permitting specially crafted form field names to create objects with __proto__ properties. When parsed results are merged into regular JavaScript objects using unsafe merge patterns, attackers can exploit this to achieve prototype pollution and modify object behavior.

CVSS v3
4.8
EG Score
4.8(medium)
EG Risk
22(Track)
EG Risk 22/100SSVC: 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
Severity48% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

July 11, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Jul 11, 2026
Patch available. Sources: github.
generic

Hono - Prototype Pollution via __proto__ Key in parseBody with dot Option | Advisories | VulnCheck

https://www.vulncheck.com/advisories/hono-prototype-pollution-via-proto-key-in-parsebody-with-dot-option
github Patch Available

__proto__ key allowed in parseBody({ dot: true }) · Advisory · honojs/hono · GitHub

https://github.com/honojs/hono/security/advisories/GHSA-v8w9-8mx6-g223

Vendor Advisories for CVE-2026-56763(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—4.12.7—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 53× 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 157 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56763?
CVE-2026-56763 is a medium vulnerability published on July 11, 2026. Hono before 4.12.7 allows proto key in parseBody with dot option enabled, permitting specially crafted form field names to create objects with proto properties. When parsed results are merged into regular JavaScript objects using unsafe merge patterns, attackers can exploit this to achieve…
When was CVE-2026-56763 disclosed?
CVE-2026-56763 was first published in the National Vulnerability Database on July 11, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56763 actively exploited?
CVE-2026-56763 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 80.1% of all scored CVEs.
What is the CVSS score of CVE-2026-56763?
CVE-2026-56763 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-56763?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56763, 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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