CVE-2026-56696: Openharness ai OpenHarness Remote Project-context Commands Allow Vulnerability

MODERATE
Advisory Identifier: GHSA-24cw-228q-3rx9
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CVSS 5.4
CWE-862
Published
Advisory Summary

CVE-2026-56696 is a MODERATE (CVSS 5.4) openharness remote project-context commands allow vulnerability (CWE-862: Missing Authorization) affecting Openharness ai libraries in the PyPI ecosystem. The issue involves openharness remote project-context commands allow persistent prompt poisoning. Remediation is available in the latest vendor maintenance releases.

CVE-2026-56696 at a Glance

CVE Identifier CVE-2026-56696
GHSA Identifier GHSA-24cw-228q-3rx9
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-862: Missing Authorization
Affected Product Openharness ai
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-56696

To remediate this vulnerability, upgrade all affected Openharness ai dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

openharness-ai fixed: Latest secure release 
pip install openharness-ai>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show openharness-ai

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-56696, inspect your installed packages using pip:

pip show openharness-ai

Analyze the terminal output to locate any version of Openharness ai in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show openharness-ai command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Openharness ai, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-56696 Affected Openharness ai Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
openharness-ai
pypi/openharness-ai
PyPI
≤ 0.1.9

References

NVD — CVE-2026-56696 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56696
Openharness ai Source Repository REPOSITORY
https://github.com/HKUDS/OpenHarness/pull/272
Security Fix Commit FIX COMMIT
https://github.com/HKUDS/OpenHarness/commit/27bb93b810e9ea8fa4832eab7152eeb3b4a6bffb
Openharness ai Source Repository REPOSITORY
https://github.com/HKUDS/OpenHarness
www.vulncheck.com/advisories/openharn... WEB
https://www.vulncheck.com/advisories/openharness-prompt-injection-via-issue-and-pr-comments-slash-commands

Frequently Asked Questions

What is CVE-2026-56696?
CVE-2026-56696 is a security vulnerability in Openharness ai involving OpenHarness remote project-context commands allow persistent prompt poisoning under CWE-862: Missing Authorization.
Which Openharness ai versions are affected?
Affected versions include releases prior to current release patches across affected packages: openharness-ai.
What version fixes CVE-2026-56696?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is openharness-ai affected?
Yes, openharness-ai is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-56696?
CVE-2026-56696 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2026-56696?
CVE-2026-56696 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check PyPI dependencies for CVE-2026-56696?
Run the dependency tree command: 'pip show openharness-ai'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-24cw-228q-3rx9",
  "modified" : "2026-09-04T17:44:00Z",
  "published" : "2026-06-23T18:31:40Z",
  "aliases" : [ "CVE-2026-56696" ],
  "summary" : "OpenHarness remote project-context commands allow persistent prompt poisoning",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "openharness-ai"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.1.9"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-56696"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/HKUDS/OpenHarness/pull/272"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/HKUDS/OpenHarness/commit/27bb93b810e9ea8fa4832eab7152eeb3b4a6bffb"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/HKUDS/OpenHarness"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openharness-prompt-injection-via-issue-and-pr-comments-slash-commands"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-04T17:44:00Z",
    "nvd_published_at" : "2026-06-23T16:17:06Z"
  }
}