Vulnerability-Lookup

CVE-2026-84857 (GCVE-0-2026-84857)

Vulnerability from cvelistv5 – Published: 2026-09-02 20:00 – Updated: 2026-09-03 15:36

Title

sigoden aichat API Endpoint serve.rs memory allocation

Summary

A flaw has been found in sigoden aichat up to 0.30.4. This affects an unknown function of the file src/serve.rs of the component API Endpoint. This manipulation causes uncontrolled memory allocation. The attack can be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Severity

6.9 (Medium)


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

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

5.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-03 15:36 UTC

CWE

CWE-789 - Uncontrolled Memory Allocation
CWE-400 - Resource Consumption

Assigner

VulDB mitre root

References

5 references

URL	Tags
https://vuldb.com/vuln/398132	vdb-entry
https://vuldb.com/vuln/398132/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-84857	third-party-advisory
https://vuldb.com/submit/886265	third-party-advisory
https://github.com/outlookgp/CVE/tree/main/AIChat…	exploit

Impacted products

1 product

Vendor	Product	Version	CPE status
sigoden	aichat	Affected: 0.30.0 Affected: 0.30.1 Affected: 0.30.2 Affected: 0.30.3 Affected: 0.30.4 cpe:2.3:a:sigoden:aichat::::::::

Credits

outlookgp (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-84857

Vulnerability from fkie_nvd - Published: 2026-09-02 20:17 - Updated: 2026-09-03 17:25

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Summary

References

	URL	Tags
	cna@vuldb.com	https://github.com/outlookgp/CVE/tree/main/AIChat_Serve_Request_Body_DoS_Report
	cna@vuldb.com	https://vuldb.com/cve/CVE-2026-84857
	cna@vuldb.com	https://vuldb.com/submit/886265
	cna@vuldb.com	https://vuldb.com/vuln/398132
	cna@vuldb.com	https://vuldb.com/vuln/398132/cti

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:sigoden:aichat:*:*:*:*:*:*:*:*"
          ],
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          "vendor": "sigoden",
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          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-84857",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-03T15:36:11.774377Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-02T20:17:42.753",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/outlookgp/CVE/tree/main/AIChat_Serve_Request_Body_DoS_Report"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/cve/CVE-2026-84857"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/886265"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/398132"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/398132/cti"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-789"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-W2M4-PJ9F-6RWH

Vulnerability from github – Published: 2026-09-02 21:32 – Updated: 2026-09-02 21:32

Details

Severity

5.3 (Medium)


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

5.5 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-84857"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-02T20:17:42Z",
    "severity": "MODERATE"
  },
  "details": "A flaw has been found in sigoden aichat up to 0.30.4. This affects an unknown function of the file src/serve.rs of the component API Endpoint. This manipulation causes uncontrolled memory allocation. The attack can be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.",
  "id": "GHSA-w2m4-pj9f-6rwh",
  "modified": "2026-09-02T21:32:08Z",
  "published": "2026-09-02T21:32:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84857"
    },
    {
      "type": "WEB",
      "url": "https://github.com/outlookgp/CVE/tree/main/AIChat_Serve_Request_Body_DoS_Report"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-84857"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/886265"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/398132"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/398132/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-84857 (GCVE-0-2026-84857)

FKIE_CVE-2026-84857

GHSA-W2M4-PJ9F-6RWH

Tags

Sightings

Nomenclature