CVE-2026-63462

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: 0.7% (51st 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
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Unleash is an open-source feature management platform. Prior to 7.5.2, 7.6.5, and 8.0.2, the shared OpenAPI validation error path in src/lib/error/bad-data-error.ts passes a raw request value from lodash.get to JSON.stringify in genericErrorMessage and fromOpenApiValidationErrors without guarding stack exhaustion. An unauthenticated attacker can send a roughly 10 KB JSON value nested thousands of levels deep to POST /edge/validate, POST /edge/issue-token, or another OpenAPI-validated endpoint, causing RangeError: Maximum call stack size exceeded in openAPIValidationMiddleware and terminating the Node process because no uncaughtException handler recovers it. Replaying the request can sustain a complete service outage. This issue is fixed in versions 7.5.2, 7.6.5, and 8.0.2.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA 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%
Exploitation40% × 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
0.7%
EPSS %ILE
51st
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 public PoC (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

August 21, 2026

Last Modified

September 9, 2026

Advisory Details (7)

Auto-updated Aug 21, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

v8.0.2

Patch available: Unleash/unleash v8.0.2

https://github.com/Unleash/unleash/releases/tag/v8.0.2
github_release Patch Available

v7.6.5

Patch available: Unleash/unleash v7.6.5

https://github.com/Unleash/unleash/releases/tag/v7.6.5
github_release Patch Available

v7.5.2

Patch available: Unleash/unleash v7.5.2

https://github.com/Unleash/unleash/releases/tag/v7.5.2
github_commit Patch Available

commit d862562a5ab8 (Unleash/unleash)

Patch available: Unleash/unleash v7.5.2 (contains commit d862562a5ab8)

https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d
github_commit Patch Available

commit d45f99df924c (Unleash/unleash)

Patch available: Unleash/unleash v7.6.5 (contains commit d45f99df924c)

https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1
github_commit Patch Available

commit b0e4da63249a (Unleash/unleash)

Patch available: Unleash/unleash v8.0.2 (contains commit b0e4da63249a)

https://github.com/Unleash/unleash/commit/b0e4da63249a9403bc209e0581db223326cb8dcf
githubMentions a patch (unverified)

Unauthenticated single-request DoS via OpenAPI validation error formatter · Advisory · Unleash/unleash · GitHub

https://github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j3xp

Vendor Advisories for CVE-2026-63462(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
unleash-server—
  • every version up to 7.5.2: fixed in 7.5.2
  • 7.6.0 up to 7.6.5: fixed in 7.6.5
  • 8.0.0 up to 8.0.2: fixed in 8.0.2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 47× 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. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-09 05:48 UTCEG score recompute
  4. 2026-10-08 17:13 UTCEPSS rescore
  5. 2026-10-08 04:55 UTCEG score recompute
  6. 2026-10-07 23:48 UTCEPSS rescore
  7. 2026-10-06 19:21 UTCEG score recompute
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  9. 2026-10-06 07:49 UTCEG score recompute
  10. 2026-10-05 17:43 UTCEPSS rescore
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  12. 2026-10-04 23:22 UTCEPSS rescore
  13. 2026-10-03 16:42 UTCEG score recompute
  14. 2026-10-03 14:26 UTCEPSS rescore
  15. 2026-10-02 20:59 UTCEG score recompute
  16. 2026-10-02 17:56 UTCEPSS rescore
  17. 2026-10-01 21:24 UTCEG score recompute
  18. 2026-10-01 19:50 UTCEPSS rescore
  19. 2026-09-30 20:28 UTCEG score recompute
  20. 2026-09-30 15:03 UTCEPSS rescore
  21. 2026-09-29 16:11 UTCEG score recompute
  22. 2026-09-29 00:36 UTCEG score recompute
  23. 2026-09-28 13:51 UTCEPSS rescore
  24. 2026-09-27 14:39 UTCEG score recompute
  25. 2026-09-27 02:28 UTCEG score recompute
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  1. 2026-09-26 15:59 UTCEPSS rescore
  2. 2026-09-24 19:01 UTCEG score recompute
  3. 2026-09-23 20:02 UTCEG score recompute
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-22 19:43 UTCEG score recompute
  6. 2026-09-22 06:24 UTCEG score recompute
  7. 2026-09-21 07:46 UTCEG score recompute
  8. 2026-09-20 20:16 UTCEPSS rescore
  9. 2026-09-19 20:20 UTCEG score recompute
  10. 2026-09-18 21:37 UTCEG score recompute
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-17 22:27 UTCEG score recompute
  13. 2026-09-16 23:48 UTCEG score recompute
  14. 2026-09-16 14:08 UTCEPSS rescore
  15. 2026-09-16 12:29 UTCEG score recompute
  16. 2026-09-16 05:15 UTCEPSS rescore
  17. 2026-09-15 13:52 UTCEG score recompute
  18. 2026-09-14 03:46 UTCEG score recompute
  19. 2026-09-12 17:50 UTCEG score recompute
  20. 2026-09-11 19:12 UTCEG score recompute
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 09:37 UTCEPSS rescore
  23. 2026-09-10 20:24 UTCEG score recompute
  24. 2026-09-09 01:46 UTCEG score recompute
  25. 2026-09-08 22:01 UTCEPSS rescore
  26. 2026-09-08 02:46 UTCEG score recompute
  27. 2026-09-07 16:01 UTCEPSS rescore
  28. 2026-09-06 16:12 UTCEG score recompute
  29. 2026-09-06 13:47 UTCEPSS rescore
  30. 2026-09-05 17:28 UTCEG score recompute
  31. 2026-09-05 15:31 UTCEPSS rescore
  32. 2026-09-04 18:47 UTCEG score recompute
  33. 2026-09-04 07:11 UTCEG score recompute
  34. 2026-09-04 05:07 UTCEPSS rescore
  35. 2026-09-02 21:00 UTCEG score recompute
  36. 2026-09-02 14:12 UTCEPSS rescore
  37. 2026-09-01 21:16 UTCEG score recompute
  38. 2026-09-01 13:54 UTCEPSS rescore
  39. 2026-08-30 23:58 UTCEG score recompute
  40. 2026-08-30 19:17 UTCEPSS rescore
  41. 2026-08-30 12:40 UTCEG score recompute
  42. 2026-08-30 01:22 UTCEPSS rescore
  43. 2026-08-29 02:35 UTCEG score recompute
  44. 2026-08-28 21:42 UTCEPSS rescore
  45. 2026-08-27 16:32 UTCEG score recompute
  46. 2026-08-27 14:25 UTCEPSS rescore
  47. 2026-08-26 17:53 UTCEG score recompute
  48. 2026-08-26 14:46 UTCEPSS rescore
  49. 2026-08-25 18:28 UTCEG score recompute
  50. 2026-08-25 17:41 UTCEG score recompute
  51. 2026-08-25 13:50 UTCEG score recompute
  52. 2026-08-25 13:49 UTCEPSS rescore
  53. 2026-08-24 15:12 UTCEG score recompute
  54. 2026-08-23 05:17 UTCEG score recompute
  55. 2026-08-23 00:19 UTCEPSS rescore
  56. 2026-08-21 19:22 UTCEG score recompute
  57. 2026-08-21 18:19 UTCEG score recompute
  58. 2026-08-21 18:19 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-63462?
CVE-2026-63462 is a high vulnerability published on August 21, 2026. Unleash is an open-source feature management platform. Prior to 7.5.2, 7.6.5, and 8.0.2, the shared OpenAPI validation error path in src/lib/error/bad-data-error.ts passes a raw request value from lodash.get to JSON.stringify in genericErrorMessage and fromOpenApiValidationErrors without guarding…
When was CVE-2026-63462 disclosed?
CVE-2026-63462 was first published on August 21, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63462 actively exploited?
CVE-2026-63462 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (51st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-63462?
CVE-2026-63462 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-2026-63462?
A fix for CVE-2026-63462 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-63462 are linked in the Vendor Advisories panel on this page.

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