GHSA-cw3j-28qq-x3xh

Source

https://github.com/advisories/GHSA-cw3j-28qq-x3xh

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-cw3j-28qq-x3xh/GHSA-cw3j-28qq-x3xh.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-cw3j-28qq-x3xh

Downstream

CGA (14)

Withdrawn

2026-10-02T18:28:39Z

Published

2026-07-01T00:34:02Z

Modified

2026-10-02T18:45:04Z

Severity

6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator

Summary

Duplicate Advisory: Hono vulnerable to Vary Header Injection leading to potential CORS Bypass

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-q7jf-gf43-6x6p. This link is maintained to preserve external references.

Original Description

Hono before 4.10.2 (fixed in 4.10.3) contains a flaw in its CORS middleware: when the origin is not set to "*", the middleware copies the Vary header from the incoming request into the response. Because Vary is a response header that should be managed by the server, an attacker can supply arbitrary Vary values that are reflected into the response, potentially causing cache key pollution and inconsistent CORS enforcement in environments that rely on shared caches or proxies.

Database specific

{
    "cwe_ids": [
        "CWE-113"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-02T18:28:39Z",
    "nvd_published_at": "2026-06-30T23:16:52Z",
    "severity": "MODERATE"
}

References

Affected packages

npm / hono

Package

Name: hono; View open source insights on deps.dev
Purl: pkg:npm/hono

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Database specific

last_known_affected_version_range

"< 4.10.3"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-cw3j-28qq-x3xh/GHSA-cw3j-28qq-x3xh.json"