Vulnerability-Lookup

GHSA-P7M5-WH78-3H6H

Vulnerability from github – Published: 2026-08-19 21:30 – Updated: 2026-08-19 21:30

Details

Heap-based buffer overflow in the multipart form-data parser in jst_post.c in RDK-B WebUI rdkb-2025q4-kirkstone.04.10.26 allows a remote unauthenticated attacker to cause memory corruption and denial of service, and potentially execute arbitrary code, via a crafted multipart/form-data request.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-19508"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-19T20:17:14Z",
    "severity": null
  },
  "details": "Heap-based buffer overflow in the multipart form-data parser in `jst_post.c` in RDK-B WebUI `rdkb-2025q4-kirkstone.04.10.26` allows a remote unauthenticated attacker to cause memory corruption and denial of service, and potentially execute arbitrary code, via a crafted multipart/form-data request.",
  "id": "GHSA-p7m5-wh78-3h6h",
  "modified": "2026-08-19T21:30:36Z",
  "published": "2026-08-19T21:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19508"
    },
    {
      "type": "WEB",
      "url": "https://developer.rdkcentral.com/documentation/documentation/rdk_broadband_documentation/components/webui"
    },
    {
      "type": "WEB",
      "url": "https://whitehats.pwr.edu.pl//blog/2026-08-19-multiple-vulnerabilities-in-rdkb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-19508 (GCVE-0-2026-19508)

Vulnerability from cvelistv5 – Published: 2026-08-19 19:28 – Updated: 2026-08-19 19:28

Title

RDK WebUI heap-based buffer overflow vulnerability

Summary

Heap-based buffer overflow in the multipart form-data parser in `jst_post.c` in RDK-B WebUI `rdkb-2025q4-kirkstone.04.10.26` allows a remote unauthenticated attacker to cause memory corruption and denial of service, and potentially execute arbitrary code, via a crafted multipart/form-data request.

Severity

No CVSS data available.

CWE

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

Assigner

certcc mitre root

References

2 references

URL	Tags
https://whitehats.pwr.edu.pl//blog/2026-08-19-mul…
https://developer.rdkcentral.com/documentation/do…

Impacted products

1 product

Vendor	Product	Version
RDK	RDK-B WebUI	Affected: rdkb-2025q4-kirkstone

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "RDK-B WebUI",
          "vendor": "RDK",
          "versions": [
            {
              "status": "affected",
              "version": "rdkb-2025q4-kirkstone"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Heap-based buffer overflow in the multipart form-data parser in `jst_post.c` in RDK-B WebUI `rdkb-2025q4-kirkstone.04.10.26` allows a remote unauthenticated attacker to cause memory corruption and denial of service, and potentially execute arbitrary code, via a crafted multipart/form-data request."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T19:28:29.196Z",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "url": "https://whitehats.pwr.edu.pl//blog/2026-08-19-multiple-vulnerabilities-in-rdkb/"
        },
        {
          "url": "https://developer.rdkcentral.com/documentation/documentation/rdk_broadband_documentation/components/webui/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "RDK WebUI heap-based buffer overflow vulnerability",
      "x_generator": {
        "engine": "VINCE 3.0.44",
        "env": "prod",
        "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-19508"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
    "cveId": "CVE-2026-19508",
    "datePublished": "2026-08-19T19:28:29.196Z",
    "dateReserved": "2026-08-10T19:14:20.637Z",
    "dateUpdated": "2026-08-19T19:28:29.196Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

GHSA-P7M5-WH78-3H6H

CVE-2026-19508 (GCVE-0-2026-19508)

Tags

Sightings

Nomenclature