Duplicate Advisory: H3: Unbounded Chunked Cookie Count in Session Cleanup Loop may Lead to Denial of Service
## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-q5pr-72pq-83v3. This link is maintained to preserve external references. ## Original Description h3 versions before 2.0.1-rc.18 fail to validate the chunk count parsed from user-controlled cookie values in setChunkedCookie() and deleteChunkedCookie() functions. Attackers can send a crafted cookie header with an extremely large chunk count to trigger an O(n²) cleanup loop that hangs the server process.
GHSA-fg72-q65g-wm5w
Primary source · Revision 1 · Withdrawn
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:GHSA-fg72-q65g-wm5w
h3
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "2.0.0-beta.4"
}
]
}
],
"package": {
"name": "h3",
"purl": "pkg:npm/h3",
"ecosystem": "npm"
},
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-fg72-q65g-wm5w/GHSA-fg72-q65g-wm5w.json",
"last_known_affected_version_range": "< 2.0.1-rc.18"
}
}
]Publisher severity
high
Source reference: /database_specific/severity
- Event
- #51911 · Revision 1
- Added to Heist Feed
- Publisher date