CVE-2026-108551

CRITICAL 9.8

openapi-typescript-codegen through 0.31.0 Code Injection via Handlebars Templates

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

openapi-typescript-codegen through 0.31.0 contains a code injection vulnerability that allows attackers controlling an OpenAPI document to inject JavaScript by supplying unescaped values interpolated into single-quoted string literals. Attackers can embed a single quote in path keys, parameter names, servers[0].url, or info.version to execute arbitrary JavaScript when generated clients are imported or service methods called.

CWE	CWE-94
Vendor	ferdikoomen
Product	openapi-typescript-codegen
Published	Oct 10, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

ferdikoomen / openapi-typescript-codegen

0 ≤ 0.31.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/ferdikoomen/openapi-typescript-codegen/issues/2809 github.com: https://github.com/ferdikoomen/openapi-typescript-codegen github.com: https://github.com/ferdikoomen/openapi-typescript-codegen/blob/v0.31.0/src/templates/exportService.hbs#L89-L110 github.com: https://github.com/ferdikoomen/openapi-typescript-codegen/blob/v0.31.0/src/templates/core/OpenAPI.hbs#L20-L23 vulncheck.com: https://www.vulncheck.com/advisories/openapi-typescript-codegen-through-0.31.0-code-injection-via-handlebars-templates

Credits

George Chen