Rejetto HFS < 3.2.1 Session Forgery via Predictable Signing Key
Rejetto HFS 3.0.0 through 3.2.0 derives its session-cookie signing key from the non-cryptographic Math.random() generator and discloses outputs of the same generator to unauthenticated clients during login. A remote attacker can collect a small number of login responses, reconstruct the generator's state, recover the signing key, and forge a valid administrator session cookie, leading to full administrative access and remote code execution via the server_code configuration feature.
CVE-2026-61500
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-61500
hfs
Source reference: /containers/cna/affected/0/product
- 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.
[
{
"repo": "https://github.com/rejetto/hfs",
"vendor": "rejetto",
"product": "hfs",
"versions": [
{
"status": "affected",
"version": "3.0.0",
"lessThan": "3.2.1",
"versionType": "semver"
}
],
"packageURL": "pkg:github/rejetto/hfs",
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-61500
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #5442 · Revision 1
- Added to Heist Feed
- Publisher date