Vulnerability-Lookup

CVE-2026-45685 (GCVE-0-2026-45685)

Vulnerability from cvelistv5 – Published: 2026-06-02 15:25 – Updated: 2026-06-02 16:42

Title

OpenTelemetry eBPF Instrumentation: MongoDB parser panics on malformed wire messages

Summary

OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. From version 0.1.0 to before version 0.9.0, malformed MongoDB wire messages can trigger uncaught panics in the MongoDB TCP parser, allowing a remote unauthenticated attacker to crash the telemetry agent and cause a denial of service. The parser operates on raw attacker-controlled network payloads before the input is fully validated, so a single crafted message can terminate telemetry collection for the affected process or node. This issue has been patched in version 0.9.0.

Severity

7.5 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-20 - Improper Input Validation
CWE-248 - Uncaught Exception
CWE-704 - Incorrect Type Conversion or Cast

Assigner

GitHub_M

References

2 references

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

Impacted products

1 product

Vendor	Product	Version
open-telemetry	opentelemetry-ebpf-instrumentation	Affected: >= 0.1.0, < 0.9.0

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-45685

Vulnerability from fkie_nvd - Published: 2026-06-02 16:16 - Updated: 2026-06-03 16:52

Severity

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

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0	Product, Release Notes
security-advisories@github.com	https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-j8p6-96vp-f3r9	Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-j8p6-96vp-f3r9	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	opentelemetry	ebpf_instrumentation	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:opentelemetry:ebpf_instrumentation:*:*:*:*:*:go:*:*",
              "matchCriteriaId": "BCE2AC35-D1F2-4F26-86A5-9A5A27595409",
              "versionEndExcluding": "0.9.0",
              "versionStartIncluding": "0.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. From version 0.1.0 to before version 0.9.0, malformed MongoDB wire messages can trigger uncaught panics in the MongoDB TCP parser, allowing a remote unauthenticated attacker to crash the telemetry agent and cause a denial of service. The parser operates on raw attacker-controlled network payloads before the input is fully validated, so a single crafted message can terminate telemetry collection for the affected process or node. This issue has been patched in version 0.9.0."
    }
  ],
  "id": "CVE-2026-45685",
  "lastModified": "2026-06-03T16:52:40.023",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-02T16:16:43.347",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-j8p6-96vp-f3r9"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-j8p6-96vp-f3r9"
    }
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  "sourceIdentifier": "security-advisories@github.com",
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          "value": "CWE-20"
        },
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        },
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          "value": "CWE-704"
        }
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      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-J8P6-96VP-F3R9

Vulnerability from github – Published: 2026-05-18 20:20 – Updated: 2026-05-18 20:20

Summary

OpenTelemetry eBPF Instrumentation: MongoDB parser panics on malformed wire messages

Details

Summary

Malformed MongoDB wire messages can trigger uncaught panics in the MongoDB TCP parser, allowing a remote unauthenticated attacker to crash the telemetry agent and cause a denial of service. The parser operates on raw attacker-controlled network payloads before the input is fully validated, so a single crafted message can terminate telemetry collection for the affected process or node.

Details

MongoDB parsing support was introduced by commit 2070f568a (Add Initial support for mongodb), so the explicit released version minimum affected is v0.1.0.

There are two related panic conditions in released go.opentelemetry.io/obi versions:

In v0.1.0 through v0.3.0, parseOpMessage reads OP_MSG flag bits from buf[msgHeaderSize:msgHeaderSize+int32Size] without first ensuring the buffer is at least msgHeaderSize + int32Size bytes long. A truncated OP_MSG packet can therefore trigger a slice-bounds panic before the parser returns an error.
In v0.1.0 through v0.3.0, parseSections consumes the section type byte and then reads the document-sequence length from buf[offSet:offSet+int32Size] without re-validating that enough bytes remain after the type byte. A malformed document-sequence section can therefore trigger another slice-bounds panic.
In v0.1.0 through v0.8.0, parseFirstField assumes the collection name for collection-scoped commands is always a string and performs an unchecked type assertion on field.Value. A malformed BSON document can therefore trigger a runtime panic with interface conversion instead of returning a parse error.

The bounds-check panic was fixed by commit 3aa58cdaaa97fbb72f8ef4c3609ae425aacaf8bb (Fix MongoDB client panic), which first appears in release v0.4.0. The unchecked BSON type assertion is still present in v0.8.0.

Because this code runs while decoding attacker-controlled MongoDB traffic, the failure mode is process termination rather than graceful rejection of invalid input. In deployments where the telemetry agent monitors traffic from untrusted or partially trusted clients, a single malformed packet can terminate collection until the agent is restarted.

Affected code paths are in pkg/ebpf/common/mongo_detect_transform.go and correspond to parseOpMessage, parseSections, and parseFirstField.

PoC

The following reproductions are fully self-contained. They create a temporary test file inside an affected checkout and then run go test against the real parser code in the repository.

Reproduce the v0.1.0 through v0.3.0 bounds-check panics:

```bash git clone https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation.git obi-poc cd obi-poc git checkout v0.3.0

cat > pkg/ebpf/common/mongo_security_poc_test.go <<'EOF' package ebpfcommon

import "testing"

func TestSecurityPoCParseOpMessageShortPanics(t *testing.T) { parseOpMessage(make([]byte, 16), 0, false, nil) }

func TestSecurityPoCParseSectionsShortDocSequencePanics(t *testing.T) { parseSections([]byte{byte(sectionTypeDocumentSequence), 0x01, 0x02, 0x03}) } EOF

go test ./pkg/ebpf/common -run 'TestSecurityPoCParseOpMessageShortPanics|TestSecurityPoCParseSectionsShortDocSequencePanics' -count=1 ```

Expected result:

TestSecurityPoCParseOpMessageShortPanics panics with a message similar to slice bounds out of range [:20] with capacity 16
TestSecurityPoCParseSectionsShortDocSequencePanics panics with a message similar to slice bounds out of range [:5] with capacity 4
Reproduce the v0.1.0 through v0.8.0 unchecked BSON type-assertion panic:

```bash git clone https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation.git obi-poc cd obi-poc git checkout v0.8.0

cat > pkg/ebpf/common/mongo_security_poc_test.go <<'EOF' package ebpfcommon

import ( "testing"

   "go.mongodb.org/mongo-driver/v2/bson"

)

func TestSecurityPoCParseFirstFieldTypeAssertionPanics(t *testing.T) { parseFirstField(bson.E{Key: commFind, Value: int32(123)}) } EOF

go test ./pkg/ebpf/common -run TestSecurityPoCParseFirstFieldTypeAssertionPanics -count=1 ```

Expected result: panic with a message similar to interface conversion: interface {} is int32, not string.

Impact

This is a remote denial-of-service vulnerability in the MongoDB protocol parser. Any deployment that enables MongoDB parsing and processes attacker-controlled or malformed MongoDB traffic is impacted. Successful exploitation lets an unauthenticated attacker crash the telemetry agent by sending a crafted OP_MSG packet or malformed BSON document, causing loss of observability until the process is restarted.

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "go.opentelemetry.io/obi"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-45685"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-248",
      "CWE-704"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-18T20:20:03Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\n\nMalformed MongoDB wire messages can trigger uncaught panics in the MongoDB TCP parser, allowing a remote unauthenticated attacker to crash the telemetry agent and cause a denial of service. The parser operates on raw attacker-controlled network payloads before the input is fully validated, so a single crafted message can terminate telemetry collection for the affected process or node.\n\n### Details\n\nMongoDB parsing support was introduced by commit `2070f568a` (`Add Initial support for mongodb`), so the explicit released version minimum affected is `v0.1.0`.\n\nThere are two related panic conditions in released `go.opentelemetry.io/obi` versions:\n\n- In `v0.1.0` through `v0.3.0`, `parseOpMessage` reads OP_MSG flag bits from `buf[msgHeaderSize:msgHeaderSize+int32Size]` without first ensuring the buffer is at least `msgHeaderSize + int32Size` bytes long. A truncated OP_MSG packet can therefore trigger a slice-bounds panic before the parser returns an error.\n- In `v0.1.0` through `v0.3.0`, `parseSections` consumes the section type byte and then reads the document-sequence length from `buf[offSet:offSet+int32Size]` without re-validating that enough bytes remain after the type byte. A malformed document-sequence section can therefore trigger another slice-bounds panic.\n- In `v0.1.0` through `v0.8.0`, `parseFirstField` assumes the collection name for collection-scoped commands is always a string and performs an unchecked type assertion on `field.Value`. A malformed BSON document can therefore trigger a runtime panic with `interface conversion` instead of returning a parse error.\n\nThe bounds-check panic was fixed by commit `3aa58cdaaa97fbb72f8ef4c3609ae425aacaf8bb` (`Fix MongoDB client panic`), which first appears in release `v0.4.0`. The unchecked BSON type assertion is still present in `v0.8.0`.\n\nBecause this code runs while decoding attacker-controlled MongoDB traffic, the failure mode is process termination rather than graceful rejection of invalid input. In deployments where the telemetry agent monitors traffic from untrusted or partially trusted clients, a single malformed packet can terminate collection until the agent is restarted.\n\nAffected code paths are in `pkg/ebpf/common/mongo_detect_transform.go` and correspond to `parseOpMessage`, `parseSections`, and `parseFirstField`.\n\n### PoC\n\nThe following reproductions are fully self-contained. They create a temporary test file inside an affected checkout and then run `go test` against the real parser code in the repository.\n\n1. Reproduce the `v0.1.0` through `v0.3.0` bounds-check panics:\n\n   ```bash\n   git clone https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation.git obi-poc\n   cd obi-poc\n   git checkout v0.3.0\n\n   cat \u003e pkg/ebpf/common/mongo_security_poc_test.go \u003c\u003c\u0027EOF\u0027\n   package ebpfcommon\n\n   import \"testing\"\n\n   func TestSecurityPoCParseOpMessageShortPanics(t *testing.T) {\n\t   parseOpMessage(make([]byte, 16), 0, false, nil)\n   }\n\n   func TestSecurityPoCParseSectionsShortDocSequencePanics(t *testing.T) {\n\t   parseSections([]byte{byte(sectionTypeDocumentSequence), 0x01, 0x02, 0x03})\n   }\n   EOF\n\n   go test ./pkg/ebpf/common -run \u0027TestSecurityPoCParseOpMessageShortPanics|TestSecurityPoCParseSectionsShortDocSequencePanics\u0027 -count=1\n   ```\n\n   Expected result:\n\n   - `TestSecurityPoCParseOpMessageShortPanics` panics with a message similar to `slice bounds out of range [:20] with capacity 16`\n   - `TestSecurityPoCParseSectionsShortDocSequencePanics` panics with a message similar to `slice bounds out of range [:5] with capacity 4`\n\n1. Reproduce the `v0.1.0` through `v0.8.0` unchecked BSON type-assertion panic:\n\n   ```bash\n   git clone https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation.git obi-poc\n   cd obi-poc\n   git checkout v0.8.0\n\n   cat \u003e pkg/ebpf/common/mongo_security_poc_test.go \u003c\u003c\u0027EOF\u0027\n   package ebpfcommon\n\n   import (\n\t   \"testing\"\n\n\t   \"go.mongodb.org/mongo-driver/v2/bson\"\n   )\n\n   func TestSecurityPoCParseFirstFieldTypeAssertionPanics(t *testing.T) {\n\t   parseFirstField(bson.E{Key: commFind, Value: int32(123)})\n   }\n   EOF\n\n   go test ./pkg/ebpf/common -run TestSecurityPoCParseFirstFieldTypeAssertionPanics -count=1\n   ```\n\n   Expected result: panic with a message similar to `interface conversion: interface {} is int32, not string`.\n\n### Impact\n\nThis is a remote denial-of-service vulnerability in the MongoDB protocol parser. Any deployment that enables MongoDB parsing and processes attacker-controlled or malformed MongoDB traffic is impacted. Successful exploitation lets an unauthenticated attacker crash the telemetry agent by sending a crafted OP_MSG packet or malformed BSON document, causing loss of observability until the process is restarted.",
  "id": "GHSA-j8p6-96vp-f3r9",
  "modified": "2026-05-18T20:20:03Z",
  "published": "2026-05-18T20:20:03Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-j8p6-96vp-f3r9"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenTelemetry eBPF Instrumentation: MongoDB parser panics on malformed wire messages"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-45685 (GCVE-0-2026-45685)

FKIE_CVE-2026-45685

GHSA-J8P6-96VP-F3R9

Summary

Details

PoC

Impact

Tags

Sightings

Nomenclature