CVE-2026-96759

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-23. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 9.8Exploit: None knownExposed: 0

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

orval before 8.29.0 fails to escape the operationId parameter when emitting it into generated TanStack Query mutator options metadata objects. Attackers can inject arbitrary JavaScript code through a crafted operationId in an OpenAPI specification that executes when generated hooks are called.

CVSS v3
9.8
EG Score
9.8(high)
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
Severity98% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

September 23, 2026

Last Modified

September 23, 2026

Advisory Details (6)

Auto-updated Sep 23, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github.
generic

orval before 8.29.0 Code Injection via operationId | Advisories | VulnCheck

https://www.vulncheck.com/advisories/orval-before-8.29.0-code-injection-via-operationid
github Patch Available🟡 PoC Available

Code injection via unescaped operationId in query/mutation mutator-options object literal · Advisory · orval-labs/orval · GitHub

https://github.com/orval-labs/orval/security/advisories/GHSA-vv88-cm6j-665j
github_pr Patch Available

fix: escape operationId in query/mutation mutator options (GHSA-vv88-…

Patch available: orval-labs/orval v8.29.0 (PR #4008 merged 2026-09-06)

https://github.com/orval-labs/orval/pull/4008
github_commit Patch Available

commit b28c53f3e0c0 (orval-labs/orval)

Patch available: orval-labs/orval v8.29.0 (contains commit b28c53f3e0c0)

https://github.com/orval-labs/orval/commit/b28c53f3e0c06190e0f6ea136737e6316432448f
generic

GitHub - orval-labs/orval: orval is able to generate client with appropriate type-signatures (TypeScript) from any valid OpenAPI v3 or Swagger v2 specification, either in yaml or json formats. 🍺 · GitHub

https://github.com/orval-labs/orval
generic

orval/packages/query/src/query-generator.ts at v8.28.1 · orval-labs/orval · GitHub

https://github.com/orval-labs/orval/blob/v8.28.1/packages/query/src/query-generator.ts#L784

Vendor Advisories for CVE-2026-96759(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 6× 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. 2026-09-24 01:57 UTCGHSA enrichment
  2. 2026-09-23 22:07 UTCEG score recompute
  3. 2026-09-23 22:07 UTCGHSA enrichment
  4. 2026-09-23 17:18 UTCEG score recompute
  5. 2026-09-23 16:39 UTCEG score recompute
  6. 2026-09-23 16:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2026-96759?
CVE-2026-96759 is a critical vulnerability published on September 23, 2026. orval before 8.29.0 fails to escape the operationId parameter when emitting it into generated TanStack Query mutator options metadata objects. Attackers can inject arbitrary JavaScript code through a crafted operationId in an OpenAPI specification that executes when generated hooks are called.
When was CVE-2026-96759 disclosed?
CVE-2026-96759 was first published in the National Vulnerability Database on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-96759?
CVE-2026-96759 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-96759?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-96759, 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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