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FKIE_CVE-2026-29181

Vulnerability from fkie_nvd - Published: 2026-04-07 21:17 - Updated: 2026-09-04 13:18
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.36.0 to 1.40.0, multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. This allows an attacker to amplify cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0.
References
security-advisories@github.comhttps://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475Exploit, Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:25271
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:47735
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:61314
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-29181
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2456252
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29181.json
Impacted products
Vendor Product Version
opentelemetry opentelemetry *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "opentelemetry-go",
          "vendor": "open-telemetry",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.36.0, \u003c 1.41.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    },
    {
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          "packageName": "cluster-observability-operator/cluster-observability-rhel9-operator",
          "product": "Cluster Observability Operator 1.5.0",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "1787593637",
              "versionType": "rpm"
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          ]
        },
        {
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          ],
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          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "1780917881",
              "versionType": "rpm"
            }
          ]
        },
        {
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          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "multicluster-engine/hypershift-addon-rhel9-operator",
          "product": "multicluster engine for Kubernetes 2.8",
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    }
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    {
      "nodes": [
        {
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              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.36.0 to 1.40.0, multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. This allows an attacker to amplify cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0."
    },
    {
      "lang": "es",
      "value": "OpenTelemetry-Go es la implementaci\u00f3n en Go de OpenTelemetry. Desde la versi\u00f3n 1.36.0 hasta la 1.40.0, la extracci\u00f3n de encabezados \u0027baggage\u0027 con m\u00faltiples valores analiza cada par campo-valor del encabezado de forma independiente y agrega los miembros a trav\u00e9s de los valores. Esto permite a un atacante amplificar el uso de CPU y las asignaciones de memoria enviando muchas l\u00edneas de encabezado \u0027baggage\u0027, incluso cuando cada valor individual est\u00e1 dentro del l\u00edmite de an\u00e1lisis de 8192 bytes por valor. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 1.41.0."
    }
  ],
  "id": "CVE-2026-29181",
  "lastModified": "2026-09-04T13:18:41.327",
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          "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"
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        "source": "security-advisories@github.com",
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          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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            {
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          "role": "CISA Coordinator",
          "timestamp": "2026-04-08T15:36:53.783712Z",
          "version": "2.0.3"
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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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.
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Detection rules are retrieved from Rulezet.