CVE-2026-56696 | OpenHarness /issue and /pr_comments slash commands lack remo… | CVSS 5.4 MEDIUM

Description

OpenHarness /issue and /pr_comments slash commands lack remote_invocable=False protection, allowing remote channel senders to write attacker-controlled Markdown into project context files. Admitted remote attackers can inject malicious content into .openharness/issue.md and .openharness/pr_comments.md files, which are subsequently injected into runtime system prompts, persistently influencing local agent behavior.

Metadata

CVE ID: CVE-2026-56696
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-22 17:09 UTC
Published: 2026-06-23 15:36 UTC
Last updated: 2026-06-23 15:46 UTC
Primary CWE: CWE-862
Missing Authorization
Vendor / Product: HKUDS / OpenHarness
Sources: cve.org · NVD

Severity & Metrics

5.4 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
HKUDS	OpenHarness	—	0 ≤ 0.1.9, 27bb93b810e9ea8fa4832eab7152eeb3b4a6bffb

Weakness (CWE)

CWE	Source	Description
CWE-862	cna	Missing Authorization

CVSS scores (2)

Score	Severity	Version	Source	Vector
5.4	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
5.3	MEDIUM	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

References (3)