CVE-2026-56669

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (48th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation, and client-server communication. Prior to 1.4.29, Elysia uses getAll in form data normalization for multipart/form-data endpoints, causing the amount of work to grow quadratically with the number of unique key-value pairs and allowing CPU exhaustion. This issue is fixed in version 1.4.29.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100CISA 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
Severity75% × 45%
Exploitation1% × 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
0.6%
EPSS %ILE
48th
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 partial (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

July 8, 2026

Last Modified

July 10, 2026

Advisory Details (4)

Auto-updated Jul 8, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

1.4.29

Patch available: elysiajs/elysia 1.4.29

https://github.com/elysiajs/elysia/releases/tag/1.4.29
generic🟡 PoC Available

README.md · GitHub

https://gist.github.com/jviide/ea040eabe7bac058326174e2cd42dfd9
github_commit Patch Available

commit 8358ff9efbce (elysiajs/elysia)

Patch available: elysiajs/elysia 1.4.29 (contains commit 8358ff9efbce)

https://github.com/elysiajs/elysia/commit/8358ff9efbcedf9534995f5977f26b9ceab59329
githubMentions a patch (unverified)🟡 PoC Available

QuadraForm, formdata doing quadratic parse · Advisory · elysiajs/elysia · GitHub

https://github.com/elysiajs/elysia/security/advisories/GHSA-9643-4qgh-g8mx

Vendor Advisories for CVE-2026-56669(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
elysia—
  • every version up to 1.4.29: fixed in 1.4.29
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 33× 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 138 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-56669?
CVE-2026-56669 is a high vulnerability published on July 8, 2026. Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation, and client-server communication. Prior to 1.4.29, Elysia uses getAll in form data normalization for multipart/form-data endpoints, causing the amount of work to grow quadratically with the number of…
When was CVE-2026-56669 disclosed?
CVE-2026-56669 was first published on July 8, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56669 actively exploited?
CVE-2026-56669 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (48th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56669?
CVE-2026-56669 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56669?
A fix for CVE-2026-56669 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56669 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-56669

Explore →

Is Your Infrastructure Affected by CVE-2026-56669?

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

Book a Demo →Browse All CVEs