Vulnerability-Lookup

GHSA-F5Q5-VP8G-WH4X

Vulnerability from github – Published: 2026-10-13 03:30 – Updated: 2026-10-13 03:30

Details

A vulnerability was found in k2-fsa sherpa-onnx up to 1.13.8. This issue affects the function OfflineTransducerGreedySearchDecoder::Decode of the file sherpa-onnx/csrc/offline-transducer-greedy-search-decoder.cc of the component Offline Transducer Greedy Search Decoder. The manipulation of the argument vocab_size results in buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. If only official model packs are used and they always keep metadata consistent with the joiner, the bug may not be reachable in normal supported usage. However, from a security and robustness standpoint, the code still contains the vulnerability because it trusts unvalidated model metadata and can be triggered by a malformed or tampered model pack.

Severity

6.3 (Medium)


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

2.1 (Low)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-108954"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-13T02:16:57Z",
    "severity": "LOW"
  },
  "details": "A vulnerability was found in k2-fsa sherpa-onnx up to 1.13.8. This issue affects the function OfflineTransducerGreedySearchDecoder::Decode of the file sherpa-onnx/csrc/offline-transducer-greedy-search-decoder.cc of the component Offline Transducer Greedy Search Decoder. The manipulation of the argument vocab_size results in buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. If only official model packs are used and they always keep metadata consistent with the joiner, the bug may not be reachable in normal supported usage. However, from a security and robustness standpoint, the code still contains the vulnerability because it trusts unvalidated model metadata and can be triggered by a malformed or tampered model pack.",
  "id": "GHSA-f5q5-vp8g-wh4x",
  "modified": "2026-10-13T03:30:34Z",
  "published": "2026-10-13T03:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-108954"
    },
    {
      "type": "WEB",
      "url": "https://github.com/k2-fsa/sherpa-onnx/issues/3983"
    },
    {
      "type": "WEB",
      "url": "https://github.com/k2-fsa/sherpa-onnx/issues/3983#issuecomment-5871985324"
    },
    {
      "type": "WEB",
      "url": "https://github.com/k2-fsa/sherpa-onnx"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-108954"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/997824"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/416773"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/416773/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/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"
    }
  ]
}

CVE-2026-108954 (GCVE-0-2026-108954)

Vulnerability from cvelistv5 – Published: 2026-10-13 01:30 – Updated: 2026-10-13 01:30

Title

k2-fsa sherpa-onnx Offline Transducer Greedy Search Decoder offline-transducer-greedy-search-decoder.cc Decode buffer overflow

Summary

Severity

5.3 (Medium)


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

6.3 (Medium)


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

6.3 (Medium)


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

CWE

CWE-120 - Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB CNA under the mitre root

CNA scorecard B 82/100 over 3876 records in the last 180 days details

References

7 references

URL	Tags
https://vuldb.com/vuln/416773	vdb-entrytechnical-description
https://vuldb.com/vuln/416773/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-108954	third-party-advisory
https://vuldb.com/submit/997824	third-party-advisory
https://github.com/k2-fsa/sherpa-onnx/issues/3983	exploitissue-tracking
https://github.com/k2-fsa/sherpa-onnx/issues/3983…	issue-tracking
https://github.com/k2-fsa/sherpa-onnx/	product

Impacted products

1 product

Vendor	Product	Version
k2-fsa	sherpa-onnx	Affected: 1.13.0 Affected: 1.13.1 Affected: 1.13.2 Affected: 1.13.3 Affected: 1.13.4 Affected: 1.13.5 Affected: 1.13.6 Affected: 1.13.7 Affected: 1.13.8 cpe:2.3:a:k2-fsa:sherpa-onnx::::::::

Credits

Dem0 (VulDB User)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:k2-fsa:sherpa-onnx:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Offline Transducer Greedy Search Decoder"
          ],
          "product": "sherpa-onnx",
          "vendor": "k2-fsa",
          "versions": [
            {
              "status": "affected",
              "version": "1.13.0"
            },
            {
              "status": "affected",
              "version": "1.13.1"
            },
            {
              "status": "affected",
              "version": "1.13.2"
            },
            {
              "status": "affected",
              "version": "1.13.3"
            },
            {
              "status": "affected",
              "version": "1.13.4"
            },
            {
              "status": "affected",
              "version": "1.13.5"
            },
            {
              "status": "affected",
              "version": "1.13.6"
            },
            {
              "status": "affected",
              "version": "1.13.7"
            },
            {
              "status": "affected",
              "version": "1.13.8"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Dem0 (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was found in k2-fsa sherpa-onnx up to 1.13.8. This issue affects the function OfflineTransducerGreedySearchDecoder::Decode of the file sherpa-onnx/csrc/offline-transducer-greedy-search-decoder.cc of the component Offline Transducer Greedy Search Decoder. The manipulation of the argument vocab_size results in buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. If only official model packs are used and they always keep metadata consistent with the joiner, the bug may not be reachable in normal supported usage. However, from a security and robustness standpoint, the code still contains the vulnerability because it trusts unvalidated model metadata and can be triggered by a malformed or tampered model pack."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 7.5,
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:C",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-120",
              "description": "Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-119",
              "description": "Memory Corruption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-13T01:30:26.511Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-416773 | k2-fsa sherpa-onnx Offline Transducer Greedy Search Decoder offline-transducer-greedy-search-decoder.cc Decode buffer overflow",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/416773"
        },
        {
          "name": "VDB-416773 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/416773/cti"
        },
        {
          "name": "CVE-2026-108954 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-108954"
        },
        {
          "name": "Submit #997824 | k2-fsa sherpa-onnx up to 1.13.8 (master commit 040afe360a38e25daaa325ce8889abf93ea02609 also affected) Heap-based Buffer Overflow",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/997824"
        },
        {
          "tags": [
            "exploit",
            "issue-tracking"
          ],
          "url": "https://github.com/k2-fsa/sherpa-onnx/issues/3983"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/k2-fsa/sherpa-onnx/issues/3983#issuecomment-5871985324"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/k2-fsa/sherpa-onnx/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-10-11T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-10-11T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-10-11T21:11:11.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "k2-fsa sherpa-onnx Offline Transducer Greedy Search Decoder offline-transducer-greedy-search-decoder.cc Decode buffer overflow",
      "x_generator": [
        "VulDB PVTS v202610"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-108954",
    "datePublished": "2026-10-13T01:30:26.511Z",
    "dateReserved": "2026-10-11T19:06:03.097Z",
    "dateUpdated": "2026-10-13T01:30:26.511Z",
    "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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-F5Q5-VP8G-WH4X

CVE-2026-108954 (GCVE-0-2026-108954)

Tags

Sightings

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