Vulnerability-Lookup

GHSA-6J7F-8JJP-MM8C

Vulnerability from github – Published: 2026-07-21 09:31 – Updated: 2026-08-18 00:30

Details

A flaw was found in libssh. During SFTP server directory listing, the longname field is constructed with unsafe concatenation into a fixed-size stack buffer. When a client causes the server to list attacker-controlled filenames, sufficiently long names can overflow that stack buffer and may lead to crashes or possible code execution on the server.

Severity

6.7 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-15370"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-21T09:16:53Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in libssh. During SFTP server directory listing, the longname field is constructed with unsafe concatenation into a fixed-size stack buffer. When a client causes the server to list attacker-controlled filenames, sufficiently long names can overflow that stack buffer and may lead to crashes or possible code execution on the server.",
  "id": "GHSA-6j7f-8jjp-mm8c",
  "modified": "2026-08-18T00:30:28Z",
  "published": "2026-07-21T09:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-15370"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:47768"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55855"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-15370"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2499049"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-15370 (GCVE-0-2026-15370)

Vulnerability from cvelistv5 – Published: 2026-07-21 09:07 – Updated: 2026-08-17 21:54

Title

Libssh: libssh: stack buffer overflow in sftp server longname construction

Summary

Severity

6.7 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-22 17:49 UTC

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1082 records in the last 180 days details

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:47768	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55855	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-15370	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2499049	issue-trackingx_refsource_REDHAT

Impacted products

4 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:0.12.0-3.el10_2 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Hardened Images	Unaffected: 0.12.2-1.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2026-07-21 09:02

Credits

Red Hat would like to thank Tristan for reporting this issue.

Show details on NVD website

JSON

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      {
        "metrics": [
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                "id": "CVE-2026-15370",
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                  },
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                  },
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                    "Technical Impact": "total"
                  }
                ],
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                "timestamp": "2026-07-22T17:49:15.900169Z",
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          "shortName": "CISA-ADP"
        },
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      }
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    "cna": {
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          ],
          "defaultStatus": "affected",
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          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "0:0.12.0-3.el10_2",
              "versionType": "rpm"
            }
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        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
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          ],
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          "packageName": "libssh-main",
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    "datePublished": "2026-07-21T09:07:34.608Z",
    "dateReserved": "2026-07-10T08:14:26.583Z",
    "dateUpdated": "2026-08-17T21:54:00.734Z",
    "state": "PUBLISHED"
  },
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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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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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