Openapi-typescript-codegen: code injection

openapi-typescript-codegen

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.

Do this now

Only generate code from trusted OpenAPI documents and upgrade past 0.31.0 when a fix is available.

First seen: 23 Oct 2026
Last update: 23 Oct 2026, 19:39 UTC
Identifiers: CVE-2026-108551
CVSS: 9.8
Source: news

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Openapi-typescript-codegen: code injection
Severity: critical. Patch status: fix status unknown.
Affected: openapi-typescript-codegen
Ids: CVE-2026-108551

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.

## Steps
1. Search the repo, its CI and infra config for openapi-typescript-codegen. If present, report the version in use and whether it's affected.
2. There is no fix yet. Until one ships: 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.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-108551") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/ferdikoomen/openapi-typescript-codegen https://nvd.nist.gov/vuln/detail/CVE-2026-108551
https://pwned.coffee/i/openapi-typescript-codegen-code-injection-cve-2026-108551

Timeline

23 Oct 2026, 19:40 UTC
Proof-of-concept code for CVE-2026-108551 is public on GitHub. Unverified, but expect scanning to follow.
23 Oct 2026
First reported.

Sources

Totalone very hot coffee