CVE-2026-71321

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 64% 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
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%CVSS: 7.5Exploit: None knownExposed: 0

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

Nuxt is an open-source web development framework for Vue.js. From 3.1.0 until 3.21.10 and 4.5.1, the internal island renderer endpoint /__nuxt_island/... decodes and hashes attacker-controlled JSON body input with destr and ohash before validating the URL-resident hash. An unauthenticated POST /__nuxt_island/_.json with a large JSON body is fully read, parsed, hashed, and then rejected, which wastes CPU on Nitro single event loop and delays concurrent requests. No valid hash and no authentication are required. This issue is fixed in 3.21.10 and 4.5.1.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 6, 2026

Advisory Details (5)

Auto-updated Aug 5, 2026
Patch available. Sources: github_commit, github_release, github.
github_release Patch Available

Release v4.5.1 (nuxt/nuxt)

Patch available: nuxt/nuxt v4.5.1

https://github.com/nuxt/nuxt/releases/tag/v4.5.1
github_release Patch Available

Release v3.21.10 (nuxt/nuxt)

Patch available: nuxt/nuxt v3.21.10

https://github.com/nuxt/nuxt/releases/tag/v3.21.10
github_commit

commit 668cdfdfda41 (nuxt/nuxt)

Fix landed in nuxt/nuxt commit 668cdfdfda41 — awaiting tagged release

https://github.com/nuxt/nuxt/commit/668cdfdfda41849ed11c1ee5e2067a11fc103b22
github_commit

commit 4e35ae9babd9 (nuxt/nuxt)

Fix landed in nuxt/nuxt commit 4e35ae9babd9 — awaiting tagged release

https://github.com/nuxt/nuxt/commit/4e35ae9babd94be53246e31200232d48438bb34e
github Patch Available

Unauthenticated CPU exhaustion parsing and hashing the Nuxt island endpoint body before hash validation · Advisory · nuxt/nuxt · GitHub

https://github.com/nuxt/nuxt/security/advisories/GHSA-9pgf-384g-p7mv

Vendor Advisories for CVE-2026-71321(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
nuxt—3.21.10—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 34× 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. 2026-08-20 22:58 UTCEG score recompute
  2. 2026-08-20 22:56 UTCEPSS rescore
  3. 2026-08-19 22:25 UTCEG score recompute
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-18 21:42 UTCEG score recompute
  6. 2026-08-18 13:49 UTCEPSS rescore
  7. 2026-08-18 13:49 UTCEPSS rescore
  8. 2026-08-17 20:44 UTCEG score recompute
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-16 20:10 UTCEG score recompute
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 07:52 UTCEG score recompute
  14. 2026-08-16 02:15 UTCEPSS rescore
  15. 2026-08-15 07:19 UTCEG score recompute
  16. 2026-08-15 01:31 UTCEPSS rescore
  17. 2026-08-14 06:46 UTCEG score recompute
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-12 17:56 UTCEG score recompute
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-11 17:22 UTCEG score recompute
  22. 2026-08-11 04:58 UTCEG score recompute
  23. 2026-08-11 00:00 UTCEPSS rescore
  24. 2026-08-09 16:09 UTCEG score recompute
  25. 2026-08-09 13:47 UTCEPSS rescore
Show 9 more
  1. 2026-08-09 03:52 UTCEG score recompute
  2. 2026-08-08 16:37 UTCEPSS rescore
  3. 2026-08-08 03:19 UTCEG score recompute
  4. 2026-08-06 14:28 UTCEG score recompute
  5. 2026-08-06 13:53 UTCEG score recompute
  6. 2026-08-06 13:47 UTCEPSS rescore
  7. 2026-08-05 22:18 UTCEG score recompute
  8. 2026-08-05 22:05 UTCEG score recompute
  9. 2026-08-05 22:05 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-71321?
CVE-2026-71321 is a high vulnerability published on August 5, 2026. Nuxt is an open-source web development framework for Vue.js. From 3.1.0 until 3.21.10 and 4.5.1, the internal island renderer endpoint /nuxtisland/... decodes and hashes attacker-controlled JSON body input with destr and ohash before validating the URL-resident hash. An unauthenticated POST…
When was CVE-2026-71321 disclosed?
CVE-2026-71321 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71321 actively exploited?
CVE-2026-71321 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 64.5% of all scored CVEs.
What is the CVSS score of CVE-2026-71321?
CVE-2026-71321 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-71321?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71321, 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-2026-71321

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