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: 0.4%, top 72% of all CVEs by exploit prediction. 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
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

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
7.5(medium)
EPSS
27.9%
KEV
Not listed

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
github Patch Available🟡 PoC Available

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

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 12× 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. 2026-07-11 21:51 UTCEG score recompute
  2. 2026-07-11 09:40 UTCEG score recompute
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-10 21:29 UTCEG score recompute
  6. 2026-07-10 09:18 UTCEG score recompute
  7. 2026-07-09 21:08 UTCEG score recompute
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-09 19:10 UTCEPSS rescore
  10. 2026-07-09 08:56 UTCEG score recompute
  11. 2026-07-08 20:44 UTCEG score recompute
  12. 2026-07-08 20:44 UTCMITRE cvelistV5first tracked

Related CVEs(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 in the National Vulnerability Database 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 27.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56669?
CVE-2026-56669 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-56669?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56669, 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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