CVE-2026-48504Network attack vector

Resource exhaustion via unbounded baggage parsing

Published Jul 17, 2026 · Updated Jul 17, 2026

Resource exhaustion in OpenTelemetry Rust 0.32.0 and earlier allows remote attackers to increase per-request CPU and memory use via baggage headers. BaggagePropagator::extract_with_context parses, percent-decodes, and allocates metadata for every inbound list member before applying storage limits. Exposure requires a service to pass untrusted propagation headers to the SDK; the resulting impact is bounded to increased resource use and availability degradation.

CVSS severity5.3
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in OpenTelemetry Rust 0.32.0 and earlier allows remote attackers to increase per-request CPU and memory use via baggage headers. BaggagePropagator::extract_with_context parses, percent-decodes, and allocates metadata for every inbound list member before applying storage limits. Exposure requires a service to pass untrusted propagation headers to the SDK; the resulting impact is bounded to increased resource use and availability degradation.

The record

CVE
CVE-2026-48504
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
OpenTelemetry
Product
OpenTelemetry Rust
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.32.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenTelemetry · OpenTelemetry Rustversion=< 0.32.1

Published CVSS scores

5.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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