CVE-2026-48504: CWE-770: Allocation of Resources Without Limits or Throttling in open-telemetry opentelemetry-rust
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.
AI Analysis
Technical Summary
CVE-2026-48504 is a resource exhaustion vulnerability in the OpenTelemetry Rust SDK (opentelemetry-rust) affecting version 0.32.0 and earlier. The vulnerability arises because the BaggagePropagator::extract_with_context function does not enforce size limits on inbound W3C Baggage headers before parsing them. As a result, an attacker can supply oversized baggage headers that cause excessive CPU work and heap allocations during parsing, even though entries exceeding storage limits are later discarded. This can lead to increased resource usage per request in affected services. The issue is resolved in version 0.32.1.
Potential Impact
The vulnerability does not impact confidentiality or integrity but can cause increased CPU and memory usage (availability impact) on services processing untrusted inbound propagation headers with oversized baggage. This may degrade service performance or availability under attack conditions. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in opentelemetry-rust version 0.32.1. Users should upgrade to version 0.32.1 or later to address this issue. Until upgraded, services should consider limiting or validating inbound baggage header sizes at the network or application layer to mitigate resource exhaustion risks.
CVE-2026-48504: CWE-770: Allocation of Resources Without Limits or Throttling in open-telemetry opentelemetry-rust
Description
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.
CVSS v3.1
Score 5.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-48504 is a resource exhaustion vulnerability in the OpenTelemetry Rust SDK (opentelemetry-rust) affecting version 0.32.0 and earlier. The vulnerability arises because the BaggagePropagator::extract_with_context function does not enforce size limits on inbound W3C Baggage headers before parsing them. As a result, an attacker can supply oversized baggage headers that cause excessive CPU work and heap allocations during parsing, even though entries exceeding storage limits are later discarded. This can lead to increased resource usage per request in affected services. The issue is resolved in version 0.32.1.
Potential Impact
The vulnerability does not impact confidentiality or integrity but can cause increased CPU and memory usage (availability impact) on services processing untrusted inbound propagation headers with oversized baggage. This may degrade service performance or availability under attack conditions. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in opentelemetry-rust version 0.32.1. Users should upgrade to version 0.32.1 or later to address this issue. Until upgraded, services should consider limiting or validating inbound baggage header sizes at the network or application layer to mitigate resource exhaustion risks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-21T15:33:08.293Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5b5eac2d1edb114c7fb222
Added to database: 07/18/2026, 11:08:28 UTC
Last enriched: 07/18/2026, 11:51:35 UTC
Last updated: 07/18/2026, 13:12:58 UTC
Views: 2
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