CVE-2026-56696

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CVSS 4.0

5.3 medium

EPSS

<1%p30

Published

Jun 23, 2026 (Jun 23, 2026)

Modified

Sep 4, 2026

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.

Ecosystems: pip
Weakness: CWE-862
Vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
GHSA: GHSA-24cw-228q-3rx9 (medium)

NVD CVE.org GitHub PoCs EPSS (0.4%)

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