PT-2026-49737 · Hono · Hono

Fg0X0 · CVE-2026-54290 · Published 2026-06-16 · Updated 2026-07-16

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Hono versions prior to 4.12.25

Description The CORS Middleware reflects the request Origin and sends Access-Control-Allow-Credentials: true when credentials: true is enabled and no explicit origin is defined (defaulting to the wildcard). This allows any site to make credentialed cross-origin requests and read responses, exposing cookie-authenticated endpoints to arbitrary origins. The middleware reflects the request Origin instead of using a wildcard, which bypasses browser restrictions that normally forbid Access-Control-Allow-Origin: * with credentials. Additionally, the preflight process echoes requested headers, approving non-simple credentialed requests.

Recommendations Update to version 4.12.25. Restrict the origin setting to specific trusted domains instead of using the wildcard when credentials: true is enabled.

Exploit

Fix

Weakness Enumeration

CWE-942

Related Identifiers

CVE-2026-54290

GHSA-88FW-HQM2-52QC

Affected Products

Hono

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54290.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-54290 · Security Note
• https://osv.dev/vulnerability/CVE-2026-54290 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-APP-NPM-CVE-2026-54290 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-88fw-hqm2-52qc · Vendor Advisory
• https://github.com/honojs/hono · Note
• https://github.com/honojs/hono/security/advisories/GHSA-88fw-hqm2-52qc · Note
• https://t.me/CVEtracker/57621 · Telegram Post