Vulnerability-Lookup

GHSA-X953-QC42-3HQH

Vulnerability from github – Published: 2026-10-18 15:30 – Updated: 2026-10-18 15:30

Details

librtmp in RTMPDump through 2.6 contains an out-of-bounds read and heap out-of-bounds write vulnerability because AMF3_Decode ignores AMF3 property decode failures. Malicious RTMP servers or man-in-the-middle attackers can send oversized AMF3 string lengths, and with the token option DecodeTEA corrupts heap memory and leaks heap bytes.

Severity

6.4 (Medium)


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

6.1 (Medium)


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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-112060"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-18T13:16:38Z",
    "severity": "MODERATE"
  },
  "details": "librtmp in RTMPDump through 2.6 contains an out-of-bounds read and heap out-of-bounds write vulnerability because AMF3_Decode ignores AMF3 property decode failures. Malicious RTMP servers or man-in-the-middle attackers can send oversized AMF3 string lengths, and with the token option DecodeTEA corrupts heap memory and leaks heap bytes.",
  "id": "GHSA-x953-qc42-3hqh",
  "modified": "2026-10-18T15:30:31Z",
  "published": "2026-10-18T15:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112060"
    },
    {
      "type": "WEB",
      "url": "https://git.ffmpeg.org/gitweb/rtmpdump.git/blob/138fdb258d9fc26f1843fd1b891180416c9dc575:/librtmp/amf.c"
    },
    {
      "type": "WEB",
      "url": "https://hackmd.io/@haindpwn/librtmp-amf3-decode-and-strict-array-oob"
    },
    {
      "type": "WEB",
      "url": "https://rtmpdump.mplayerhq.hu"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/librtmp-rtmpdump-through-2.6-heap-out-of-bounds-write-via-amf3-decode"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/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-2026-112060 (GCVE-0-2026-112060)

Vulnerability from cvelistv5 – Published: 2026-10-18 12:19 – Updated: 2026-10-19 16:12

Title

librtmp (RTMPDump) through 2.6 Heap Out-of-Bounds Write via AMF3_Decode

Summary

Severity

6.1 (Medium)


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

6.4 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-19 16:10 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6487 records in the last 180 days details

References

4 references

URL	Tags
https://hackmd.io/@haindpwn/librtmp-amf3-decode-a…	third-party-advisory
https://git.ffmpeg.org/gitweb/rtmpdump.git/blob/1…	technical-description
https://rtmpdump.mplayerhq.hu/	product
https://www.vulncheck.com/advisories/librtmp-rtmp…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
RTMPDump	librtmp	Affected: 0 , ≤ 2.6 (custom)

Date Public

2026-10-17 18:49

Credits

HaiND from the Post and Telecommunication Institute of Technology

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-112060",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-19T16:10:21.266030Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-19T16:12:27.073Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://git.ffmpeg.org/rtmpdump",
          "defaultStatus": "unaffected",
          "product": "librtmp",
          "repo": "https://git.ffmpeg.org/rtmpdump",
          "vendor": "RTMPDump",
          "versions": [
            {
              "lessThanOrEqual": "2.6",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "HaiND from the Post and Telecommunication Institute of Technology"
        }
      ],
      "datePublic": "2026-10-17T18:49:31.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "librtmp in RTMPDump through 2.6 contains an out-of-bounds read and heap out-of-bounds write vulnerability because AMF3_Decode ignores AMF3 property decode failures. Malicious RTMP servers or man-in-the-middle attackers can send oversized AMF3 string lengths, and with the token option DecodeTEA corrupts heap memory and leaks heap bytes."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
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            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
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        {
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            "baseScore": 6.4,
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            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H",
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          },
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      "references": [
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          "tags": [
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          "url": "https://hackmd.io/@haindpwn/librtmp-amf3-decode-and-strict-array-oob"
        },
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          ],
          "url": "https://git.ffmpeg.org/gitweb/rtmpdump.git/blob/138fdb258d9fc26f1843fd1b891180416c9dc575:/librtmp/amf.c"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://rtmpdump.mplayerhq.hu/"
        },
        {
          "name": "VulnCheck Advisory: librtmp (RTMPDump) through 2.6 Heap Out-of-Bounds Write via AMF3_Decode",
          "tags": [
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          ],
          "url": "https://www.vulncheck.com/advisories/librtmp-rtmpdump-through-2.6-heap-out-of-bounds-write-via-amf3-decode"
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  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-112060",
    "datePublished": "2026-10-18T12:19:50.440Z",
    "dateReserved": "2026-10-18T12:00:07.227Z",
    "dateUpdated": "2026-10-19T16:12:27.073Z",
    "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.

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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.
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