Vulnerability-Lookup

CVE-2026-54788 (GCVE-0-2026-54788)

Vulnerability from cvelistv5 – Published: 2026-08-28 16:33 – Updated: 2026-08-31 18:57

Title

dd-trace-rs: Unbounded W3C tracestate parsing may lead to DoS

Summary

dd-trace-rs provides Datadog application performance monitoring for Rust. From 0.1.0 until 0.3.3, datadog-opentelemetry/src/propagation/tracecontext.rs parses the W3C tracestate header and collects every semicolon-separated key and value pair in the Datadog dd=... vendor entry into a HashMap without enforcing a pair count or entry size limit. Because tracecontext extraction is enabled by default, a remote unauthenticated attacker can send an arbitrarily large dd=... entry and force excessive CPU and memory consumption for each request, causing denial of service in an instrumented network service. This vulnerability is fixed in 0.3.3.

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: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-31 18:57 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/DataDog/dd-trace-rs/security/a…	x_refsource_CONFIRM
https://github.com/DataDog/dd-trace-rs/pull/218	x_refsource_MISC
https://github.com/DataDog/dd-trace-rs/commit/77c…	x_refsource_MISC
https://github.com/DataDog/dd-trace-rs/releases/t…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
DataDog	dd-trace-rs	Affected: >= 0.1.0, < 0.3.3	guessed

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-54788",
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          }
        ],
        "id": "CVE-2026-54788",
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}

FKIE_CVE-2026-54788

Vulnerability from fkie_nvd - Published: 2026-08-28 20:18 - Updated: 2026-09-09 21:09

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/DataDog/dd-trace-rs/commit/77c5d185c71d0ea8103da0e6cf4cd50677ffacd2
	security-advisories@github.com	https://github.com/DataDog/dd-trace-rs/pull/218
	security-advisories@github.com	https://github.com/DataDog/dd-trace-rs/releases/tag/datadog-opentelemetry-v0.3.3
	security-advisories@github.com	https://github.com/DataDog/dd-trace-rs/security/advisories/GHSA-gpwf-4h98-v82q

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "dd-trace-rs",
          "vendor": "DataDog",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.1.0, \u003c 0.3.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "dd-trace-rs provides Datadog application performance monitoring for Rust. From 0.1.0 until 0.3.3, datadog-opentelemetry/src/propagation/tracecontext.rs parses the W3C tracestate header and collects every semicolon-separated key and value pair in the Datadog dd=... vendor entry into a HashMap without enforcing a pair count or entry size limit. Because tracecontext extraction is enabled by default, a remote unauthenticated attacker can send an arbitrarily large dd=... entry and force excessive CPU and memory consumption for each request, causing denial of service in an instrumented network service. This vulnerability is fixed in 0.3.3."
    }
  ],
  "id": "CVE-2026-54788",
  "lastModified": "2026-09-09T21:09:13.080",
  "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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
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          "role": "CISA Coordinator",
          "timestamp": "2026-08-31T18:57:04.416602Z",
          "version": "2.0.3"
        }
      }
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  },
  "published": "2026-08-28T20:18:17.950",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/DataDog/dd-trace-rs/commit/77c5d185c71d0ea8103da0e6cf4cd50677ffacd2"
    },
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      "source": "security-advisories@github.com",
      "url": "https://github.com/DataDog/dd-trace-rs/pull/218"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/DataDog/dd-trace-rs/releases/tag/datadog-opentelemetry-v0.3.3"
    },
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}

GHSA-GPWF-4H98-V82Q

Vulnerability from github – Published: 2026-08-28 16:35 – Updated: 2026-08-28 16:35

Summary

datadog-opentelemetry has unbounded W3C tracestate parsing that may lead to DoS

Details

Impact

Datadog tracing libraries that implement W3C Trace Context (tracecontext) propagation parse the incoming tracestate header without enforcing a size cap on the Datadog vendor entry (dd=...). The dd= value contains semicolon-separated key:value pairs, and the parser allocates a hash-map entry for each pair. A remote, unauthenticated attacker can send a tracestate header whose dd= member is arbitrarily large (or contains an arbitrarily large number of pairs), forcing unbounded CPU and memory consumption per request and enabling a remote Denial of Service. tracecontext extraction is enabled by default in affected tracers, so any internet-facing service instrumented with an affected version is exposed unless tracecontext has been explicitly removed from the propagation style configuration.

Patches

This is resolved in version 0.3.3 and later of the dd-trace-rs library.

Workarounds

If you cannot upgrade immediately: 1. Disable tracecontext extraction by setting DD_TRACE_PROPAGATION_STYLE_EXTRACT to a value that does not include tracecontext (for example, datadog). 2. Cap the maximum HTTP request header size at an upstream proxy or web server.

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": "crates.io",
        "name": "datadog-opentelemetry"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.1.0"
            },
            {
              "fixed": "0.3.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54788"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-28T16:35:03Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\nDatadog tracing libraries that implement W3C Trace Context (`tracecontext`) propagation parse the incoming `tracestate` header without enforcing a size cap on the Datadog vendor entry (`dd=...`). The `dd=` value contains semicolon-separated `key:value` pairs, and the parser allocates a hash-map entry for each pair. A remote, unauthenticated attacker can send a `tracestate` header whose `dd=` member is arbitrarily large (or contains an arbitrarily large number of pairs), forcing unbounded CPU and memory consumption per request and enabling a remote Denial of Service. `tracecontext` extraction is enabled by default in affected tracers, so any internet-facing service instrumented with an affected version is exposed unless `tracecontext` has been explicitly removed from the propagation style configuration.\n\n### Patches\nThis is resolved in version 0.3.3 and later of the `dd-trace-rs` library.\n\n### Workarounds\nIf you cannot upgrade immediately:\n1. Disable `tracecontext` extraction by setting `DD_TRACE_PROPAGATION_STYLE_EXTRACT` to a value that does not include `tracecontext` (for example, `datadog`).\n2. Cap the maximum HTTP request header size at an upstream proxy or web server.",
  "id": "GHSA-gpwf-4h98-v82q",
  "modified": "2026-08-28T16:35:03Z",
  "published": "2026-08-28T16:35:03Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/dd-trace-rs/security/advisories/GHSA-gpwf-4h98-v82q"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/dd-trace-rs/pull/218"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/dd-trace-rs/commit/77c5d185c71d0ea8103da0e6cf4cd50677ffacd2"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/DataDog/dd-trace-rs"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/dd-trace-rs/releases/tag/datadog-opentelemetry-v0.3.3"
    }
  ],
  "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": "datadog-opentelemetry has unbounded W3C tracestate parsing that may lead to DoS"
}

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.

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-2026-54788 (GCVE-0-2026-54788)

FKIE_CVE-2026-54788

GHSA-GPWF-4H98-V82Q

Impact

Patches

Workarounds

Tags

Sightings

Nomenclature

Related by attack behaviour