Vulnerability-Lookup

GHSA-G54X-7HPM-29Q8

Vulnerability from github – Published: 2026-02-27 06:31 – Updated: 2026-02-27 06:31

Details

In OCaml before 4.14.3 and 5.x before 5.4.1, a buffer over-read in Marshal deserialization (runtime/intern.c) enables remote code execution through a multi-phase attack chain. The vulnerability stems from missing bounds validation in the readblock() function, which performs unbounded memcpy() operations using attacker-controlled lengths from crafted Marshal data.

Severity ?

7.9 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-28364"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-126"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-27T04:16:03Z",
    "severity": "HIGH"
  },
  "details": "In OCaml before 4.14.3 and 5.x before 5.4.1, a buffer over-read in Marshal deserialization (runtime/intern.c) enables remote code execution through a multi-phase attack chain. The vulnerability stems from missing bounds validation in the readblock() function, which performs unbounded memcpy() operations using attacker-controlled lengths from crafted Marshal data.",
  "id": "GHSA-g54x-7hpm-29q8",
  "modified": "2026-02-27T06:31:28Z",
  "published": "2026-02-27T06:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28364"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ocaml/security-advisories/blob/generated-osv/2026/OSEC-2026-01.json"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/OSEC-2026-01"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-28364 (GCVE-0-2026-28364)

Vulnerability from cvelistv5 – Published: 2026-02-27 03:54 – Updated: 2026-02-27 15:49

Summary

Severity ?

7.9 (High)


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

CWE

CWE-126 - Buffer Over-read

Assigner

mitre

References

URL

Tags

	https://github.com/ocaml/security-advisories/blob…
	https://osv.dev/vulnerability/OSEC-2026-01

Impacted products

	Vendor	Product	Version
	OCaml	OCaml	Affected: 0 , < 4.14.3 (semver) Affected: 5.0.0 , < 5.4.1 (semver)

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JSON

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                "id": "CVE-2026-28364",
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2026-02-27T15:48:53.652379Z",
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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-G54X-7HPM-29Q8

CVE-2026-28364 (GCVE-0-2026-28364)

Tags

Sightings

Nomenclature