CVE-2026-56696

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-06-23. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.4
EG Score
5.4(high)
EPSS
12.0%
KEV
Not listed

Published

June 23, 2026

Last Modified

June 23, 2026

Advisory Details (3)

Auto-updated Jun 23, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic

OpenHarness - Prompt Injection via /issue and /pr_comments Slash Commands | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openharness-prompt-injection-via-issue-and-pr-comments-slash-commands
github_commit

commit 27bb93b810e9 (HKUDS/OpenHarness)

Fix landed in HKUDS/OpenHarness commit 27bb93b810e9 — awaiting tagged release

https://github.com/HKUDS/OpenHarness/commit/27bb93b810e9ea8fa4832eab7152eeb3b4a6bffb
github_pr

[security] fix(commands): keep project context commands local-only

Fix merged in HKUDS/OpenHarness PR #272 on 2026-05-24 — awaiting tagged release

https://github.com/HKUDS/OpenHarness/pull/272

Vendor Advisories for CVE-2026-56696(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 21× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 06:39 UTCEG score recompute
  4. 2026-07-06 06:39 UTCGHSA enrichment
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 05:28 UTCEG score recompute
  8. 2026-07-05 05:28 UTCGHSA enrichment
  9. 2026-07-05 02:31 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-04 04:15 UTCEG score recompute
  14. 2026-07-04 04:15 UTCGHSA enrichment
  15. 2026-07-03 02:29 UTCEG score recompute
  16. 2026-07-03 02:29 UTCGHSA enrichment
  17. 2026-07-02 01:15 UTCEG score recompute
  18. 2026-07-02 01:15 UTCGHSA enrichment
  19. 2026-07-01 15:07 UTCEPSS rescore
  20. 2026-07-01 00:05 UTCEG score recompute
  21. 2026-07-01 00:05 UTCGHSA enrichment
  22. 2026-06-29 22:49 UTCEG score recompute
  23. 2026-06-29 22:49 UTCGHSA enrichment
  24. 2026-06-29 14:06 UTCEPSS rescore
  25. 2026-06-28 21:39 UTCEG score recompute
Show 17 more
  1. 2026-06-28 21:39 UTCGHSA enrichment
  2. 2026-06-28 14:07 UTCEPSS rescore
  3. 2026-06-28 04:56 UTCEPSS rescore
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-27 20:29 UTCEG score recompute
  6. 2026-06-27 20:29 UTCGHSA enrichment
  7. 2026-06-27 03:08 UTCEPSS rescore
  8. 2026-06-26 19:19 UTCEG score recompute
  9. 2026-06-26 19:18 UTCGHSA enrichment
  10. 2026-06-25 18:08 UTCEG score recompute
  11. 2026-06-25 18:08 UTCGHSA enrichment
  12. 2026-06-25 13:49 UTCEPSS rescore
  13. 2026-06-24 16:57 UTCEG score recompute
  14. 2026-06-24 16:57 UTCGHSA enrichment
  15. 2026-06-24 14:05 UTCEPSS rescore
  16. 2026-06-23 15:46 UTCEG score recompute
  17. 2026-06-23 15:45 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56696?
CVE-2026-56696 is a medium vulnerability published on June 23, 2026. OpenHarness /issue and /prcomments slash commands lack remoteinvocable=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…
When was CVE-2026-56696 disclosed?
CVE-2026-56696 was first published in the National Vulnerability Database on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56696 actively exploited?
CVE-2026-56696 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56696?
CVE-2026-56696 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-56696?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56696, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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