CVE-2026-29181

high

Description

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

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29181.json

https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475

https://bugzilla.redhat.com/show_bug.cgi?id=2456252

https://access.redhat.com/security/cve/CVE-2026-29181

https://access.redhat.com/errata/RHSA-2026:25271

Details

Source: Mitre, NVD

Published: 2026-04-07

Updated: 2026-07-15

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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

Severity: High

EPSS

EPSS: 0.0004