Resource exhaustion in Open-Telemetry Opentelemetry-Rust
CVE-2026-48504
OpenTelemetry Rust is the Rust OpenTelemetry implementation. In 0.32.0 and earlier, BaggagePropagator::extract_with_context in opentelemetry_sdk did not enforce W3C Baggage size limits before parsing an inbound baggage header, so a large attacker-controlled header could cause unnecessary CPU work and short-lived heap allocations while parsing entries later discarded by the SDK's baggage storage limits. Services that accept untrusted inbound propagation headers may experience increased per-request resource usage when processing oversized baggage headers. This issue is fixed in version 0.32.1.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.004 (34.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Open-Telemetry Opentelemetry-Rust — versions < 0.32.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-48504?
- CVE-2026-48504 is a medium-severity vulnerability in Open-Telemetry Opentelemetry-Rust, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-07-17.
- How severe is CVE-2026-48504?
- Medium severity. CVSS v3 base score is 5.3 out of 10.