Vulnerability-Lookup

GHSA-785M-9Q28-JP3M

Vulnerability from github – Published: 2026-04-17 18:31 – Updated: 2026-04-17 18:31

Details

OpenHarness before commit bd4df81 contains a server-side request forgery vulnerability in the web_fetch and web_search tools that allows attackers to access private and localhost HTTP services by manipulating tool parameters without proper validation of target addresses. Attackers can influence an agent session to invoke these tools against loopback, RFC1918, link-local, or other non-public addresses to read response bodies from local development services, cloud metadata endpoints, admin panels, or other private HTTP services reachable from the victim host.

Severity ?

8.3 (High)


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

7.8 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:L/SA:L

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{
  "affected": [],
  "aliases": [
    "CVE-2026-40516"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-17T17:17:09Z",
    "severity": "HIGH"
  },
  "details": "OpenHarness before commit\u00a0bd4df81 contains a server-side request forgery vulnerability in the web_fetch and web_search tools that allows attackers to access private and localhost HTTP services by manipulating tool parameters without proper validation of target addresses. Attackers can influence an agent session to invoke these tools against loopback, RFC1918, link-local, or other non-public addresses to read response bodies from local development services, cloud metadata endpoints, admin panels, or other private HTTP services reachable from the victim host.",
  "id": "GHSA-785m-9q28-jp3m",
  "modified": "2026-04-17T18:31:53Z",
  "published": "2026-04-17T18:31:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40516"
    },
    {
      "type": "WEB",
      "url": "https://github.com/HKUDS/OpenHarness/pull/92"
    },
    {
      "type": "WEB",
      "url": "https://github.com/HKUDS/OpenHarness/commit/bd4df81f634f8c7cddcc3fdf7f561a13dcbf03ae"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openharness-ssrf-via-web-fetch-and-web-search"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:L/SA:L/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-40516 (GCVE-0-2026-40516)

Vulnerability from cvelistv5 – Published: 2026-04-17 16:02 – Updated: 2026-04-17 16:27

Title

OpenHarness SSRF via web_fetch and web_search

Summary

Severity ?

7.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:L/SA:L

8.3 (High)


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

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

VulnCheck

References

URL

Tags

	https://github.com/HKUDS/OpenHarness/pull/92	issue-tracking
	https://github.com/HKUDS/OpenHarness/commit/bd4df…	patch
	https://www.vulncheck.com/advisories/openharness-…	third-party-advisory

Impacted products

	Vendor	Product	Version
	HKUDS	OpenHarness	Affected: 0 , < bd4df81f634f8c7cddcc3fdf7f561a13dcbf03ae (git)

Credits

Chia Min Jun Lennon

Show details on NVD website

JSON

To clipboard

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  "containers": {
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                "id": "CVE-2026-40516",
                "options": [
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                  },
                  {
                    "Automatable": "yes"
                  },
                  {
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-17T16:27:07.696134Z",
                "version": "2.0.3"
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        "providerMetadata": {
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          }
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          "repo": "https://github.com/HKUDS/OpenHarness",
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    "datePublished": "2026-04-17T16:02:09.082Z",
    "dateReserved": "2026-04-13T20:29:02.809Z",
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-785M-9Q28-JP3M

CVE-2026-40516 (GCVE-0-2026-40516)

Tags

Sightings

Nomenclature