CVE-2026-56696
published 2026-06-23CVE-2026-56696: OpenHarness /issue and /pr_comments slash commands lack remote_invocable=False protection, allowing remote channel senders to write attacker-controlled…
PriorityP432medium5.4CVSS 3.1
AVNACLPRLUINSUCLILAN
EPSS
0.22%
11.9th percentile
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.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| hkuds | openharness | <= 0.1.9 | — |
CVSS provenance
nvdv3.15.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
nvdv4.05.3MEDIUMCVSS: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
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
HKUDS OpenHarness up to 0.1.9 openharness/issue.md authorization
vuldb·2026-06-23·CVSS 5.4
CVE-2026-56696 [MEDIUM] HKUDS OpenHarness up to 0.1.9 openharness/issue.md authorization
A vulnerability classified as critical was found in HKUDS OpenHarness up to 0.1.9. Affected by this issue is some unknown functionality of the file openharness/issue.md. The manipulation results in missing authorization.
This vulnerability is cataloged as CVE-2026-56696. The attack may be launched remotely. There is no exploit available.
It is advisable to implement a patch to correct this issue.
GHSA
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.
ghsa_unreviewed·2026-06-23
CVE-2026-56696 [MEDIUM] CWE-862 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.
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-06-23
Published