CVE-2026-54661
Code injection in swagger-typescript-api templates allows injected JS in generated clients.
Is CVE-2026-54661 being exploited?
Not confirmed. CVE-2026-54661 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.27% probability of exploitation in the next 30 days.
How severe is CVE-2026-54661?
CVE-2026-54661 is rated High with a CVSS score of 8.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-54661?
Yes. A fix has been recorded for CVE-2026-54661. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-54661 affect?
CVE-2026-54661 affects swagger-typescript-api < 13.12.2, Node.js/TypeScript projects using generated clients, Generated Axios/Fetch HTTP clients from untrusted OpenAPI specs. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-54661?
Upgrade to swagger-typescript-api >= 13.12.2 and avoid processing untrusted OpenAPI specs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker-controlled OpenAPI spec can inject JS into generated client, causing code execution when new HttpClient()/Api() is constructed.
Immediate action required
- affected< 13.12.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.