CVE-2026-45404OpenTelemetry-Go: Unsynchronized baggage map can panic under concurrent access
Updated under an hour ago ()
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It affects open-telemetry opentelemetry-go. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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OpenTelemetry-Go is the Go implementation of OpenTelemetry. From version 0.11.0 through 1.44.0, the OpenTracing bridge's bridgeSpan contains an unsynchronized extraBaggageItems map which can cause a panic. Because Go maps are not safe for concurrent read/write access, concurrent SetBaggageItem and correlation.MapFromContext calls on the same hooked bridgeSpan can trigger a fatal runtime error—such as concurrent map read and map write or concurrent map iteration and map write—terminating the process and causing denial of service. This issue is fixed in version 1.45.0.
- CVSS
- 5.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-362, CWE-667
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Aug 27, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
open-telemetry opentelemetry-go open_telemetry:opentelemetry_go (from the name) | from 0.11.0, < 1.45.0 | CNA record |
References
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-42cj-99w8-cp2px-refsource-confirm
- https://github.com/open-telemetry/opentelemetry-go/pull/8693x-refsource-misc
- https://github.com/open-telemetry/opentelemetry-go/commit/93a693edeed0e07ce5ebd1dfe67af42d1e2055d8x-refsource-misc
- https://github.com/open-telemetry/opentelemetry-go/releases/tag/v1.45.0x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.