CVE-2026-39882GO-2026-4985GHSA-W8RR-5GCM-PP58
OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 1.43.0, 0.19.0
- 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: no
- Technical impact: partial
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to 1.43.0, the otlp HTTP exporters (traces/metrics/logs) read the full HTTP response body into an in-memory bytes.Buffer without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can mitm the exporter connection). This vulnerability is fixed in 1.43.0.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- open-telemetry opentelemetry-go
fixed in 1.43.0
- go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttpGo
fixed in 0.19.0
- go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttpGo
fixed in 1.43.0
- go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttpGo
fixed in 1.43.0