CVE-2026-54662PoC

LOWCVSS 8.3 · HIGH

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft
Track advisory updates for patch or workaround availability

Recommended action window: High priority (within 72h)

NVD description

swagger-typescript-api generates API clients for Fetch or Axios from OpenAPI specifications. Prior to 13.12.2, src/code-gen-process.ts createApiConfig copies servers[0].url into apiConfig.baseUrl, and templates/base/http-clients/fetch-http-client.ejs interpolates apiConfig.baseUrl into the generated HttpClient baseUrl field without escaping, allowing an attacker-controlled OpenAPI spec to inject TypeScript static field code that executes when the generated fetch client module is imported. This issue is fixed in version 13.12.2.

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1.5/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-74CWE-94CWE-1336

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

NONE

Threat summary

Public PoC is present in monitored signal
1 mentions across 1 observed day

What's happening

PoC mentioned or linked in 1 signal
Technical details provided in 1 signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

PoC

1100.0%

Referenced assets1 URL

By indicator

https://thegriffyn.me/blog/oss/six-cves-in-swagger-typescript-api

Full discourse1 post

Hamza@TheGr1ffyn137d
PoC
I got six CVEs in a major npm package including 4 RCEs. CVE-2026-54662, CVE-2026-54661, CVE-2026-54666, CVE-2026-54664, CVE-2026-54660, CVE-2026-54663 Full writeup with every sink and payload here: https://thegriffyn.me/blog/oss/six-cves-in-swagger-typescript-api #infosec #cybersecurity #rce
Post summary
The post announces six CVEs in a popular npm package, highlights that four of them allow remote code execution, and points to a detailed blog post containing sinks and payloads, serving as a proof‑of‑concept.
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