CVE-2026-54666
Template-literal injection in swagger-typescript-api allows execution in generated API clients.
Is CVE-2026-54666 being exploited?
Not confirmed. CVE-2026-54666 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 0.29% probability of exploitation in the next 30 days.
How severe is CVE-2026-54666?
CVE-2026-54666 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-2026-54666?
Yes. A fix has been recorded for CVE-2026-54666. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-54666 affect?
CVE-2026-54666 affects swagger-typescript-api < 13.12.2, Generated Fetch/Axios API clients from affected versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-54666?
Upgrade to swagger-typescript-api v13.12.2; sanitize OpenAPI paths if delay unavoidable.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker-controlled OpenAPI path with ${...} can execute arbitrary JavaScript when generated client methods run, enabling code execution or data exfiltration.
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.