Read the docs
TI-2026-55273 Aliases CVE-2026-79900GHSA-58w4-cf2c-hf22

Heap overflow in KSL checksum initialization

Priority LOW 28CWE-787Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

boks_ksllogsd accepts a checksum algorithm name in the MD field of an authenticated KSL start message. Affected releases verify that OpenSSL recognizes the digest name but do not verify that the value fits in a fixed 16-byte checksum context field before copying it. An authenticated KSL client can supply an oversized, OpenSSL-recognized digest name and write beyond the end of the heap allocation.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00235 14th percentileScored 2026-11-07
Fix Fixed BoKS Manager boks-server (Fortra): 8.1.0.24, 9.0.0.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
FortraBoKS Manager boks-serverbefore 8.1.0.24; before 9.0.0.78.1.0.24, 9.0.0.7Patch availableCNA
  • BoKS Manager boks-server VendorFortra Affected before 8.1.0.24; before 9.0.0.7 Fixed in 8.1.0.24, 9.0.0.7 Patch available CNA

Remediation

  • Fix · CNA BoKS Manager boks-server (Fortra) Fixed in 8.1.0.24, 9.0.0.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-79900
  2. 2026-10-03 Alias added: GHSA-58w4-cf2c-hf22

References

Other 1

  • TI-2025-09211 Deserialization Vulnerability in GoAnywhere MFT's License Servlet KEVCVSS 3.1CRITICAL 10.0
  • TI-2022-20934 Cobalt Strike 4.7.1 fails to properly escape HTML tags when they are displayed on Swing… KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-00185 Authentication Bypass in GoAnywhere MFT CVSS 3.1CRITICAL 9.8
  • TI-2024-04900 SQL Injection Vulnerability in FileCatalyst Workflow 5.1.6 Build 135 (and earlier) CVSS 3.1CRITICAL 9.8
  • TI-2023-00634 Fortra GoAnywhere MFT License Response Servlet Command Injection KEVCVSS 3.1HIGH 7.2
  • TI-2022-18577 An XSS (Cross Site Scripting) vulnerability was found in HelpSystems Cobalt Strike… KEVCVSS 3.1MEDIUM 6.1
See all 49 →

Sources

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