CVE-2026-29086
Medium · 5.4CVSS
5.4
EPSS
0.3%
Published
Mar 4, 2026
CISA due date
—
The record
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, the setCookie() utility did not validate semicolons (;), carriage returns (\r), or newline characters (\n) in the domain and path options when constructing the Set-Cookie header. Because cookie attributes are delimited by semicolons, this could allow injection of additional cookie attributes if untrusted input was passed into these fields. This issue has been patched in version 4.12.4.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | hono | 0 | 4.12.4 |
| Chainguard | hono | 0 | 0 |
| Chainguard | hono-adapter-mqtt | 0 | 0 |
| Chainguard | hono-cli | 0 | 0 |
| Chainguard | hono-compat | 0 | 0 |
| Chainguard | hono-service-auth | 0 | 0 |
| Chainguard | hono-service-command-router | 0 | 0 |
| Chainguard | hono-service-device-registry-jdbc | 0 | 0 |
| Chainguard | kibana-9.1 | 0 | 9.1.10-r7 |
| Chainguard | kibana-9.1-iamguarded | 0 | 9.1.10-r7 |
| Chainguard | librechat | 0 | 0.8.3-r1 |
| Chainguard | opensearch-dashboards-2 | 0 | 2.19.5-r3 |
| Chainguard | opensearch-dashboards-2-fips | 0 | 2.19.5-r1 |
| Wolfi | opensearch-dashboards-2 | 0 | 2.19.5-r3 |
Related vulnerabilities
- GHSA-5pq2-9x2x-5p6w Hono Vulnerable to Cookie Attribute Injection via Unsanitized domain and path in… Same vulnerability
- CVE-2026-54288 Hono is a Web application framework that provides support for any JavaScript runtime. Also affects hono
- CVE-2026-54289 Hono is a Web application framework that provides support for any JavaScript runtime. Also affects hono
- CVE-2026-54286 Hono is a Web application framework that provides support for any JavaScript runtime. Also affects hono
- CVE-2026-54290 Hono is a Web application framework that provides support for any JavaScript runtime. Also affects hono
- CVE-2026-54287 Hono is a Web application framework that provides support for any JavaScript runtime. Also affects hono
- GHSA-rv63-4mwf-qqc2 hono: Body Limit Middleware can be bypassed on AWS Lambda by understating `Content-Length` Also affects hono
- GHSA-wgpf-jwqj-8h8p hono: Lambda@Edge adapter keeps only the last value of a repeated request header… Also affects hono