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VulnerabilityPublished Updated

CVE-2026-29181: open-telemetry opentelemetry-go · Unthrottled Resource Allocation

Affects open-telemetry opentelemetry-goSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 1.41.0 soon.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 56% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.41.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade opentelemetry-go and github.com/open-telemetry/opentelemetry-go to 1.41.0.

Affected software

ProductAffectedFixed in
open-telemetryopentelemetry-goAffected
  • >=1.36.0 <1.41.0
Fixed in
  • 1.41.0
Gogithub.com/open-telemetry/opentelemetry-gopkg:golang/github.com/open-telemetry/opentelemetry-goOther threatsAffected
  • >=1.36.0 <1.41.0
Fixed in
  • 1.41.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in OpenTelemetry-Go version 1.41.0. Users should upgrade to this version or later to remediate the vulnerability. Red Hat customers should follow the vendor advisories and upgrade affected products accordingly. No alternative mitigations or temporary fixes are documented in the advisory.

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

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