Read the docs
TI-2023-20844 Aliases CVE-2023-39951

Information disclosure in open-telemetry opentelemetry-java-instrumentation

Priority MEDIUM 62CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.

Summary

OpenTelemetry Java Instrumentation provides OpenTelemetry auto-instrumentation and instrumentation libraries for Java. OpenTelemetry Java Instrumentation prior to version 1.28.0 contains an issue related to the instrumentation of Java applications using the AWS SDK v2 with Amazon Simple Email Service (SES) v1 API. When SES POST requests are instrumented, the query parameters of the request are inserted into the trace `url.path` field. This behavior leads to the http body, containing the email subject and message, to be present in the trace request url metadata. Any user using a version before 1.28.0 of OpenTelemetry Java Instrumentation to instrument AWS SDK v2 call to SES’s v1 SendEmail API is affected. The e-mail content sent to SES may end up in telemetry backend. This exposes the e-mail content to unintended audiences. The issue can be mitigated by updating OpenTelemetry Java Instrumentation to version 1.28.0 or later.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00836 57th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed opentelemetry-java-instrumentation (open-telemetry): 1.28.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
open-telemetryopentelemetry-java-instrumentationbefore 1.28.01.28.0Patch availableCNA
  • opentelemetry-java-instrumentation Vendoropen-telemetry Affected before 1.28.0 Fixed in 1.28.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:opentelemetry_instrumentation_for_java:*:*:*:*:*:*:*:*before 1.28.0Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:opentelemetry_instrumentation_for_java:*:*:*:*:*:*:*:* Versions before 1.28.0 Vulnerable ·backstage

Remediation

  • Fix · CNA opentelemetry-java-instrumentation (open-telemetry) Fixed in 1.28.0

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-39951

References

Exploit 1

Patch 1

Advisory 1

  • TI-2024-23957 OpenTelemetry Collector has a Denial of Service via Zip/Decompression Bomb sent over HTTP or gRPC CVSS 3.1HIGH 8.2
  • TI-2026-42706 OpenTelemetry JavaScript: Denial of service in `JaegerPropagator` via unhandled exception on a malformed header CVSS 3.1HIGH 7.5
  • TI-2026-33428 OpenTelemetry eBPF Instrumentation: Memcached payload length overflow can crash OBI CVSS 3.1HIGH 7.5
  • TI-2026-33427 OpenTelemetry eBPF Instrumentation: MongoDB parser panics on malformed wire messages CVSS 3.1HIGH 7.5
  • TI-2026-33420 OpenTelemetry eBPF Instrumentation: Postgres BIND parsing can panic on malformed payloads CVSS 3.1HIGH 7.5
  • TI-2026-32777 opentelemetry-js: Prometheus exporter process crash via malformed HTTP request CVSS 3.1HIGH 7.5
See all 62 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences