Vulnerability-Lookup

CVE-2026-45287 (GCVE-0-2026-45287)

Vulnerability from cvelistv5 – Published: 2026-06-04 14:45 – Updated: 2026-06-08 18:27

Title

OpenTelemetry-Go's Schema ParseFile leaks file descriptors on each parse

Summary

OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.0.17, `go.opentelemetry.io/otel/schema/v1.0` and `go.opentelemetry.io/otel/schema/v1.1` leaks one file descriptor on each successful `ParseFile` call. `ParseFile` opens the schema file and passes it to `Parse` without closing it; repeated parsing in a long-running process can exhaust the process file descriptor limit and cause denial of service. Exploitation depends on a consuming application exposing repeated schema parsing to an attacker-controlled path. Version 0.0.17 contains a patch for the issue.

Severity

2.1 (Low)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-08 18:27 UTC

CWE

CWE-772 - Missing Release of Resource after Effective Lifetime
CWE-775 - Missing Release of File Descriptor or Handle after Effective Lifetime

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7639 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_CONFIRM
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_MISC
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_MISC

Impacted products

2 products

Vendor	Product	Version	CPE status
open-telemetry	go.opentelemetry.io/otel/schema/v1.1	Affected: < 0.0.17	guessed
open-telemetry	go.opentelemetry.io/otel/schema/v1.0	Affected: < 0.0.17	guessed

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-45287",
                "options": [
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                  },
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                    "Technical Impact": "partial"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-06-08T18:27:31.389905Z",
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            }
          ],
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            "discovery": "UNKNOWN"
          },
          "title": "OpenTelemetry-Go\u0027s Schema ParseFile leaks file descriptors on each parse"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-45287",
        "datePublished": "2026-06-04T14:45:54.522Z",
        "dateReserved": "2026-05-11T20:14:43.200Z",
        "dateUpdated": "2026-06-08T18:27:46.212Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

CLEANSTART-2026-LK11440 (CVE-2026-45287)

Vulnerability from cleanstart – Published: 2026-10-21 00:37 – Updated: 2026-10-20 06:47 – Source website

Summary

OpenTelemetry-Go is the Go implementation of OpenTelemetry

Details

Security vulnerability affects the opentelemetry-collector-contrib package. OpenTelemetry-Go is the Go implementation of OpenTelemetry.

Severity

5.5 (Medium)


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

2.1 (Low)


                    
                      CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/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

References

URL

Type

	https://github.com/cleanstart-dev/cleanstart-secu…	ADVISORY
	https://osv.dev/vulnerability/CVE-2026-45287	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-45287	WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "opentelemetry-collector-contrib",
        "purl": "pkg:apk/cleanstart/opentelemetry-collector-contrib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.152.0-r1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Security vulnerability affects the opentelemetry-collector-contrib package. OpenTelemetry-Go is the Go implementation of OpenTelemetry.",
  "id": "CLEANSTART-2026-LK11440",
  "modified": "2026-10-20T06:47:15Z",
  "published": "2026-10-21T00:37:41.996709Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-LK11440.json"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-45287"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45287"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/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"
    }
  ],
  "summary": "OpenTelemetry-Go is the Go implementation of OpenTelemetry",
  "upstream": [
    "CVE-2026-45287"
  ]
}

CLEANSTART-2026-OC99762 (CVE-2026-2303)

Vulnerability from cleanstart – Published: 2026-08-13 12:10 – Updated: 2026-09-18 11:59 – Source website

Withdrawn 2026-09-18

Summary

Security fixes in opentelemetry-collector-contrib 0.153.0-r1

Details

Package opentelemetry-collector-contrib version 0.153.0-r1 fixes 6 vulnerabilities: CVE-2026-2303, ghsa-cp6g-7hqx-qxhp, CVE-2026-45287, ghsa-995v-fvrw-c78m, CVE-2026-48496...

References

URL

Type

https://github.com/open-telemetry/opentelemetry-c…

WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "opentelemetry-collector-contrib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.153.0-r1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.153.0-r1"
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Package opentelemetry-collector-contrib version 0.153.0-r1 fixes 6 vulnerabilities: CVE-2026-2303, ghsa-cp6g-7hqx-qxhp, CVE-2026-45287, ghsa-995v-fvrw-c78m, CVE-2026-48496...",
  "id": "CLEANSTART-2026-OC99762",
  "modified": "2026-09-18T11:59:01.768079Z",
  "published": "2026-08-13T12:10:09Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-telemetry/opentelemetry-collector-contrib"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "summary": "Security fixes in opentelemetry-collector-contrib 0.153.0-r1",
  "upstream": [
    "CVE-2026-2303",
    "ghsa-cp6g-7hqx-qxhp",
    "CVE-2026-45287",
    "ghsa-995v-fvrw-c78m",
    "CVE-2026-48496",
    "ghsa-f2r5-5m7w-p5cx"
  ],
  "withdrawn": "2026-09-18T11:59:01.768079Z"
}

CLEANSTART-2026-PI47059 (GHSA-HRXH-6V49-42GF)

Vulnerability from cleanstart – Published: 2026-07-30 07:10 – Updated: 2026-09-18 11:59 – Source website

Withdrawn 2026-09-18

Summary

Security fixes in opentelemetry-collector-contrib 0.152.0-r1

Details

Package opentelemetry-collector-contrib version 0.152.0-r1 fixes 2 vulnerabilities: ghsa-hrxh-6v49-42gf, CVE-2026-45287

References

URL

Type

https://github.com/open-telemetry/opentelemetry-c…

WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "opentelemetry-collector-contrib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.152.0-r1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.152.0-r1"
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Package opentelemetry-collector-contrib version 0.152.0-r1 fixes 2 vulnerabilities: ghsa-hrxh-6v49-42gf, CVE-2026-45287",
  "id": "CLEANSTART-2026-PI47059",
  "modified": "2026-09-18T11:59:01.768079Z",
  "published": "2026-07-30T07:10:53Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-telemetry/opentelemetry-collector-contrib"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "summary": "Security fixes in opentelemetry-collector-contrib 0.152.0-r1",
  "upstream": [
    "ghsa-hrxh-6v49-42gf",
    "CVE-2026-45287"
  ],
  "withdrawn": "2026-09-18T11:59:01.768079Z"
}

CLEANSTART-2026-YI22158 (CVE-2026-45287)

Vulnerability from cleanstart – Published: 2026-09-18 09:52 – Updated: 2026-10-09 06:58 – Source website

Summary

Security fix for CVE-2026-45287 applied in: opentelemetry-collector-contrib 0.153.0-r1

Details

Security vulnerability affects the opentelemetry-collector-contrib package. This issue is resolved in later releases. See references for vulnerability details.

Severity

5.5 (Medium)


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

2.1 (Low)


                    
                      CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/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

References

URL

Type

	https://github.com/cleanstart-dev/cleanstart-secu…	ADVISORY
	https://osv.dev/vulnerability/CVE-2026-45287	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-45287	WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "opentelemetry-collector-contrib",
        "purl": "pkg:apk/cleanstart/opentelemetry-collector-contrib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.153.0-r1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Security vulnerability affects the opentelemetry-collector-contrib package. This issue is resolved in later releases. See references for vulnerability details.",
  "id": "CLEANSTART-2026-YI22158",
  "modified": "2026-10-09T06:58:33Z",
  "published": "2026-09-18T09:52:27.217059Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-YI22158.json"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-45287"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45287"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/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"
    }
  ],
  "summary": "Security fix for CVE-2026-45287 applied in: opentelemetry-collector-contrib 0.153.0-r1",
  "upstream": [
    "CVE-2026-45287"
  ]
}

FKIE_CVE-2026-45287

Vulnerability from fkie_nvd - Published: 2026-06-04 16:16 - Updated: 2026-07-22 20:10

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/open-telemetry/opentelemetry-go/commit/e72a235518cb773137efd80336a179028bc34684	Patch
security-advisories@github.com	https://github.com/open-telemetry/opentelemetry-go/commit/f12d198f161b61735d65705248715aa97021ba8d	Patch
security-advisories@github.com	https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-995v-fvrw-c78m	Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-995v-fvrw-c78m	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	opentelemetry	telemetry_schema_files	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "go.opentelemetry.io/otel/schema/v1.1",
          "vendor": "open-telemetry",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.0.17"
            }
          ]
        },
        {
          "product": "go.opentelemetry.io/otel/schema/v1.0",
          "vendor": "open-telemetry",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.0.17"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:opentelemetry:telemetry_schema_files:*:*:*:*:*:go:*:*",
              "matchCriteriaId": "C1E07F4C-8807-4E10-9070-74A758A72A4E",
              "versionEndExcluding": "0.0.17",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.0.17, `go.opentelemetry.io/otel/schema/v1.0` and `go.opentelemetry.io/otel/schema/v1.1` leaks one file descriptor on each successful `ParseFile` call. `ParseFile` opens the schema file and passes it to `Parse` without closing it; repeated parsing in a long-running process can exhaust the process file descriptor limit and cause denial of service. Exploitation depends on a consuming application exposing repeated schema parsing to an attacker-controlled path. Version 0.0.17 contains a patch for the issue."
    },
    {
      "lang": "es",
      "value": "OpenTelemetry-Go es la implementaci\u00f3n en Go de OpenTelemetry. Antes de la versi\u00f3n 0.0.17, \u0027go.opentelemetry.io/otel/schema/v1.0\u0027 y \u0027go.opentelemetry.io/otel/schema/v1.1\u0027 filtran un descriptor de archivo en cada llamada exitosa a \u0027ParseFile\u0027. \u0027ParseFile\u0027 abre el archivo de esquema y lo pasa a \u0027Parse\u0027 sin cerrarlo; el an\u00e1lisis repetido en un proceso de larga duraci\u00f3n puede agotar el l\u00edmite de descriptores de archivo del proceso y causar denegaci\u00f3n de servicio. La explotaci\u00f3n depende de que una aplicaci\u00f3n consumidora exponga el an\u00e1lisis repetido del esquema a una ruta controlada por un atacante. La versi\u00f3n 0.0.17 contiene un parche para el problema."
    }
  ],
  "id": "CVE-2026-45287",
  "lastModified": "2026-07-22T20:10:00.127",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 2.1,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45287",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-08T18:27:31.389905Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-04T16:16:38.690",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/open-telemetry/opentelemetry-go/commit/e72a235518cb773137efd80336a179028bc34684"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/open-telemetry/opentelemetry-go/commit/f12d198f161b61735d65705248715aa97021ba8d"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-995v-fvrw-c78m"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-995v-fvrw-c78m"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-772"
        },
        {
          "lang": "en",
          "value": "CWE-775"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-995V-FVRW-C78M

Vulnerability from github – Published: 2026-05-28 17:19 – Updated: 2026-07-15 21:49

Summary

opentelemetry-go's Schema ParseFile leaks file descriptors on each parse

Details

Summary

go.opentelemetry.io/otel/schema/v1.0 and go.opentelemetry.io/otel/schema/v1.1 leaks one file descriptor on each successful ParseFile call. ParseFile opens the schema file and passes it to Parse without closing it; repeated parsing in a long-running process can exhaust the process file descriptor limit and cause denial of service. The severity is low because exploitation depends on a consuming application exposing repeated schema parsing to an attacker-controlled path.

Introduced in commit: e72a235

Details

In schema/v1.0/parser.go:41-47, ParseFile opens the requested schema path with os.Open and then returns Parse(file) without a defer file.Close() or other close path:

file, err := os.Open(schemaFilePath)
if err != nil {
    return nil, err
}
return Parse(file)

The validation evidence also identifies schema/v1.0/parser.go:50-73: Parse accepts an io.Reader, decodes from it, and does not close it. Ownership of the opened file is therefore not transferred to Parse, leaving the descriptor open until the Go runtime eventually finalizes the file object. With repeated ParseFile calls, descriptors can accumulate until the process receives EMFILE / "too many open files".

PoC

validation-artifact.zip

The local artifact validation-artifact.zip contains:

leak_poc.go: PoC source that repeatedly calls schema.ParseFile("schema/v1.0/testdata/valid-example.yaml") and prints /proc/self/fd counts.
LEAK_POC_README.txt: reproduction notes.
leak_poc_run.log: captured attempted run; the local offline environment failed before execution because Go module download from proxy.golang.org was forbidden.

Reproduce from the root of a checkout of pellared/opentelemetry-go at commit e72a235 with Go module dependencies already available:

/bin/sh -c 'ulimit -n 256; GOGC=off go run leak_poc.go'

Configuration:

File descriptor soft limit: 256
Garbage collection: disabled with GOGC=off so leaked descriptors are not reclaimed during the loop
Schema file: schema/v1.0/testdata/valid-example.yaml

Expected output is increasing descriptor counts followed by an EMFILE failure, for example:

iter 0 fds 7
iter 50 fds 57
iter 100 fds 107
...
panic: iteration 248: open schema/v1.0/testdata/valid-example.yaml: too many open files

The exact initial descriptor count and failing iteration can vary by OS and process state.

Impact

This is a file descriptor resource leak leading to availability loss. Applications that call schema.ParseFile repeatedly, especially through a runtime reload or request-controlled path, can exhaust their process file descriptor table and fail subsequent file, socket, or other descriptor operations. Impact is limited to denial of service of the consuming process; the evidence does not show confidentiality or integrity impact.

Severity

2.1 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.0.16"
      },
      "package": {
        "ecosystem": "Go",
        "name": "go.opentelemetry.io/otel/schema/v1.1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.0.16"
      },
      "package": {
        "ecosystem": "Go",
        "name": "go.opentelemetry.io/otel/schema/v1.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "go.opentelemetry.io/otel/schema"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-45287"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-772",
      "CWE-775"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-28T17:19:10Z",
    "nvd_published_at": "2026-06-04T16:16:38Z",
    "severity": "LOW"
  },
  "details": "### Summary\n\n`go.opentelemetry.io/otel/schema/v1.0` and `go.opentelemetry.io/otel/schema/v1.1` leaks one file descriptor on each successful `ParseFile` call. `ParseFile` opens the schema file and passes it to `Parse` without closing it; repeated parsing in a long-running process can exhaust the process file descriptor limit and cause denial of service. The severity is low because exploitation depends on a consuming application exposing repeated schema parsing to an attacker-controlled path.\n\nIntroduced in commit: e72a235\n\n### Details\n\nIn `schema/v1.0/parser.go:41-47`, `ParseFile` opens the requested schema path with `os.Open` and then returns `Parse(file)` without a `defer file.Close()` or other close path:\n\n```go\nfile, err := os.Open(schemaFilePath)\nif err != nil {\n\treturn nil, err\n}\nreturn Parse(file)\n```\n\nThe validation evidence also identifies `schema/v1.0/parser.go:50-73`: `Parse` accepts an `io.Reader`, decodes from it, and does not close it. Ownership of the opened file is therefore not transferred to `Parse`, leaving the descriptor open until the Go runtime eventually finalizes the file object. With repeated `ParseFile` calls, descriptors can accumulate until the process receives `EMFILE` / \"too many open files\".\n\n### PoC\n\n[validation-artifact.zip](https://github.com/user-attachments/files/27494463/validation-artifact.zip)\n\nThe local artifact `validation-artifact.zip` contains:\n\n- `leak_poc.go`: PoC source that repeatedly calls `schema.ParseFile(\"schema/v1.0/testdata/valid-example.yaml\")` and prints `/proc/self/fd` counts.\n- `LEAK_POC_README.txt`: reproduction notes.\n- `leak_poc_run.log`: captured attempted run; the local offline environment failed before execution because Go module download from `proxy.golang.org` was forbidden.\n\nReproduce from the root of a checkout of `pellared/opentelemetry-go` at commit `e72a235` with Go module dependencies already available:\n\n```sh\n/bin/sh -c \u0027ulimit -n 256; GOGC=off go run leak_poc.go\u0027\n```\n\nConfiguration:\n\n- File descriptor soft limit: `256`\n- Garbage collection: disabled with `GOGC=off` so leaked descriptors are not reclaimed during the loop\n- Schema file: `schema/v1.0/testdata/valid-example.yaml`\n\nExpected output is increasing descriptor counts followed by an `EMFILE` failure, for example:\n\n```text\niter 0 fds 7\niter 50 fds 57\niter 100 fds 107\n...\npanic: iteration 248: open schema/v1.0/testdata/valid-example.yaml: too many open files\n```\n\nThe exact initial descriptor count and failing iteration can vary by OS and process state.\n\n### Impact\n\nThis is a file descriptor resource leak leading to availability loss. Applications that call `schema.ParseFile` repeatedly, especially through a runtime reload or request-controlled path, can exhaust their process file descriptor table and fail subsequent file, socket, or other descriptor operations. Impact is limited to denial of service of the consuming process; the evidence does not show confidentiality or integrity impact.",
  "id": "GHSA-995v-fvrw-c78m",
  "modified": "2026-07-15T21:49:11Z",
  "published": "2026-05-28T17:19:10Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-995v-fvrw-c78m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45287"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-telemetry/opentelemetry-go/commit/e72a235518cb773137efd80336a179028bc34684"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-telemetry/opentelemetry-go/commit/f12d198f161b61735d65705248715aa97021ba8d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-telemetry/opentelemetry-go"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "opentelemetry-go\u0027s Schema ParseFile leaks file descriptors on each parse"
}

RHSA-2026:15859

Vulnerability from csaf_redhat - Published: 2026-05-09 14:56 - Updated: 2026-10-15 11:56

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Low

Scope

1 vulnerability in this advisory, including CVE-2026-45287.

CVE-2026-45287

A flaw was found in OpenTelemetry-Go (before schema package version 0.0.17). ParseFile in go.opentelemetry.io/otel/schema/v1.0 and v1.1 opens a schema file and passes it to Parse without closing it, leaking one file descriptor per successful call. Repeated parsing in a long-running process can exhaust the file descriptor limit and cause denial of service.

4.0 (Medium)


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

Fixed: 13 products

https://access.redhat.com/errata/RHSA-2026:15859

Open the full advisory

RHSA-2026:15862

Vulnerability from csaf_redhat - Published: 2026-05-09 15:24 - Updated: 2026-10-20 13:16

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Critical

Scope

5 vulnerabilities in this advisory, including CVE-2026-45287.

CVE-2026-45287

4.0 (Medium)


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

Fixed: 3 products

https://access.redhat.com/errata/RHSA-2026:15862

Open the full advisory

RHSA-2026:21399

Vulnerability from csaf_redhat - Published: 2026-05-27 17:26 - Updated: 2026-10-15 11:56

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Low

Scope

1 vulnerability in this advisory, including CVE-2026-45287.

CVE-2026-45287

4.0 (Medium)


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

Fixed: 5 products

https://access.redhat.com/errata/RHSA-2026:21399

Open the full advisory

RHSA-2026:23263

Vulnerability from csaf_redhat - Published: 2026-06-04 12:41 - Updated: 2026-10-15 11:56

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Low

Scope

1 vulnerability in this advisory, including CVE-2026-45287.

CVE-2026-45287

4.0 (Medium)


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

Fixed: 5 products

https://access.redhat.com/errata/RHSA-2026:23263

Open the full advisory

Sightings

Author	Source	Type	Date	Other

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

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-45287 (GCVE-0-2026-45287)

CLEANSTART-2026-LK11440 (CVE-2026-45287)

CLEANSTART-2026-OC99762 (CVE-2026-2303)

CLEANSTART-2026-PI47059 (GHSA-HRXH-6V49-42GF)

CLEANSTART-2026-YI22158 (CVE-2026-45287)

FKIE_CVE-2026-45287

GHSA-995V-FVRW-C78M

Summary

Details

PoC

Impact

RHSA-2026:15859

RHSA-2026:15862

RHSA-2026:21399

RHSA-2026:23263

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