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TI-2026-44080 Aliases CVE-2026-61500GHSA-xxrm-3f86-v97j

Rejetto HFS < 3.2.1 Session Forgery via Predictable Signing Key

Priority MEDIUM 52CWE-338Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01908 79th percentileScored 2026-11-07
Fix Fixed hfs (rejetto): 3.2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Rejettohfs3.0.0 to before 3.2.13.2.1Patch availableCNA
  • hfs VendorRejetto Affected 3.0.0 to before 3.2.1 Fixed in 3.2.1 Patch available CNA

Remediation

  • Fix · CNA hfs (rejetto) Fixed in 3.2.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    rejetto hfs 3.2.1

    6 records Highest priority Priority MEDIUM 1 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2026-44085 Rejetto HFS < 3.2.1 Limited File Disclosure via Path Traversal in lang ParameterPriority LOW 37
    • TI-2026-44083 Rejetto HFS < 3.2.1 Username Enumeration via Login Response DifferencesPriority LOW 37
    • TI-2026-44081 Rejetto HFS < 3.2.1 Stored XSS in Admin Log ViewerPriority LOW 24
    Show all 6 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-61500
  2. 2026-10-03 Alias added: GHSA-xxrm-3f86-v97j

References

Patch 1

  • TI-2024-15709 Rejetto HTTP File Server 2.3m Unauthenticated RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05168 The findMacroMarker function in parserLib.pas in Rejetto HTTP File Server (aks HFS or… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-64043 HFS2 2.4.0 Unauthenticated Arbitrary File Read/Write via Template Engine CVSS 4.0CRITICAL 10.0
  • TI-2026-64042 HFS2 2.4.0 RCE via Multipart Upload Filename Template Injection CVSS 4.0CRITICAL 10.0
  • TI-2024-26831 rejetto HFS (aka HTTP File Server) 3 before 0.52.10 on Linux, UNIX, and macOS allows OS… CVSS 3.1CRITICAL 9.9
  • TI-2026-64044 HFS2 2.4.0 Unauthenticated Denial of Service via Hung Serving Thread CVSS 4.0HIGH 8.7
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences