CVE-2026-40894GHSA-G94R-2VXG-569J
OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.15.3
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. In OpenTelemetry.Api 0.5.0-beta.2 to 1.15.2 and OpenTelemetry.Extensions.Propagators 1.3.1 to 1.15.2, The implementation details of the baggage, B3 and Jaeger processing code in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators NuGet packages can allocate excessive memory when parsing which could create a potential denial of service (DoS) in the consuming application. This vulnerability is fixed in 1.15.3.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- open-telemetry opentelemetry-dotnet
From 0.5.0-beta.2 · fixed in 1.15.3
- open-telemetry OpenTelemetry.Api
From 0.5.0-beta.2 · fixed in 1.15.3
- open-telemetry OpenTelemetry.Extensions.Propagators
From 1.3.1 · fixed in 1.15.3
- OpenTelemetry.ApiNuGet
From 0.5.0-beta.2 · fixed in 1.15.3
- OpenTelemetry.Extensions.PropagatorsNuGet
From 1.3.1 · fixed in 1.15.3