High
golang-opentelemetry-otel — security advisory
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.
- Products
- golang-opentelemetry-otel
- Affected versions
- 1.1.0-2, 1.16.0-1, 1.31.0-4, 1.31.0-5, 1.31.0-6, 1.43.0-4build1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-29181
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:58 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-29181
golang-opentelemetry-otel
Fixed versions: Not specified
golang-opentelemetry-otel
Fixed versions: Not specified
golang-opentelemetry-otel
Fixed versions: Not specified
golang-opentelemetry-otel
Fixed versions: Not specified
golang-opentelemetry-otel
Fixed versions: Not specified
Complete source record
{
"id": "dfb0f3c80ed534acedbafb0ce8a8a55ad4aa7a062f284978c3e350232bb31318",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-29181",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-29181",
"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.",
"evidence": "osv:UBUNTU-CVE-2026-29181",
"products": [
{
"name": {
"value": "golang-opentelemetry-otel",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.0-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "golang-opentelemetry-otel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.16.0-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "golang-opentelemetry-otel",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.31.0-4",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "golang-opentelemetry-otel",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.31.0-6",
"evidence": "/affected/3/versions"
},
{
"value": "1.43.0-4build1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "golang-opentelemetry-otel",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.31.0-4",
"evidence": "/affected/4/versions"
},
{
"value": "1.31.0-5",
"evidence": "/affected/4/versions"
},
{
"value": "1.31.0-6",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-29181",
"aliases": [
"UBUNTU-CVE-2026-29181"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-opentelemetry-otel",
"purl": "pkg:deb/ubuntu/golang-opentelemetry-otel?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.1.0-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29181.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-opentelemetry-otel-dev",
"binary_version": "1.1.0-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
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],
"package": {
"name": "golang-opentelemetry-otel",
"purl": "pkg:deb/ubuntu/golang-opentelemetry-otel?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.16.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29181.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-opentelemetry-otel-dev",
"binary_version": "1.16.0-1"
}
]
}
},
{
"ranges": [
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"package": {
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"purl": "pkg:deb/ubuntu/golang-opentelemetry-otel?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"1.31.0-4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29181.json"
},
"ecosystem_specific": {
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{
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"binary_version": "1.31.0-4"
}
]
}
},
{
"ranges": [
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"package": {
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"purl": "pkg:deb/ubuntu/golang-opentelemetry-otel?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1.31.0-6",
"1.43.0-4build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29181.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-opentelemetry-otel-dev",
"binary_version": "1.43.0-4build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
"name": "golang-opentelemetry-otel",
"purl": "pkg:deb/ubuntu/golang-opentelemetry-otel?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.31.0-4",
"1.31.0-5",
"1.31.0-6"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29181.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-opentelemetry-otel-dev",
"binary_version": "1.31.0-6"
}
]
}
}
],
"modified": "2026-10-17T12:59:57.019997816Z",
"provider": "osv",
"upstream": [
"CVE-2026-29181"
],
"references": [
"https://ubuntu.com/security/CVE-2026-29181",
"https://www.cve.org/CVERecord?id=CVE-2026-29181",
"https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475"
]
},
"related_cves": [
{
"value": "CVE-2026-29181",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360025,
"published_at": "2026-04-07T21:17:00+00:00"
}