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  4. CVE 2026 103918 orpczod prototype injection in smart coercion
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Back to active CVEs
Medium · CVSS 6.5CVE-2026-103918

@orpc/zod: Prototype injection in smart coercion

Answer in brief

CVE-2026-103918 records a Medium severity (CVSS 6.5) vulnerability in @orpc/zod: Prototype injection in smart coercion. The current sources do not mark it as known exploited. The current feed maps middleapi/orpc (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 2, 2026Updated Oct 2, 2026Source checked Oct 2, 2026First seen by HOL Oct 2, 2026Material review Oct 2, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps middleapi/orpc (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
middleapi/orpcgeneric<1.14.101.14.10

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for middleapi/orpc.
  2. 2Review the reported fix. Update middleapi/orpc to 1.14.10 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 2, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

oRPC is a tool that helps build APIs that are end-to-end type-safe and adhere to OpenAPI standards. Prior to 1.14.10, the @orpc/zod ZodSmartCoercionPlugin and experimental_ZodSmartCoercionPlugin collect object and record properties in plain objects and resolve shape keys through the prototype chain. A remote client that can reach a procedure with an object or record input can supply __proto__ to replace the prototype of the returned request object, allowing attacker-controlled inherited values to reach application lookups. For object schemas, keys such as constructor, toString, and __proto__ can instead resolve inherited members as Zod schemas and cause an unhandled TypeError before validation. The global Object.prototype, unrelated objects, other requests, and other users are not modified, and the availability effect is limited to crafted requests rather than persistent process-wide state. This issue is fixed in version 1.14.10.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • @orpc/json-schema: Prototype injection in smart coercionSame middleapi/orpc package
  • Tinypool: Prototype Pollution gadget in worker options leads to Remote Code ExecutionAlso CWE-1321
  • Tinypool: Prototype Pollution Gadget to RCE in run() optionsAlso CWE-1321
  • CodeArt Google MP3 Audio Player 1.0.11 Arbitrary File Read via direct_download.phpSame generic ecosystem
  • Weaver e-Bridge Unauthenticated Arbitrary File Read via saveYZJFileSame generic ecosystem
  • H3C CVM Unauthenticated File Upload via fileUpload/upload TokenSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-915, CWE-1321
Source
CVE List V5
Source checked
Oct 2, 2026
References
4 linked sources
Open source record