CVE-2026-79900

Heap overflow in KSL checksum initialization

MEDIUM
6.5
CVSS Score
Published: October 1, 2026 at 02:11 PM UTC
Updated: October 1, 2026 at 08:34 PM UTC
1 product affected across 1 vendorCore Privileged Access Manager Server

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 8.1.0.24v < 9.0.0.7
Affected range stops below 8.1.0.24, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.0.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMFortra
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-787

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