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Medium severity5.3GHSA Advisory· Published Jun 22, 2026· Updated Aug 27, 2026

CVE-2026-54285

CVE-2026-54285

Description

opentelemetry-js is the OpenTelemetry JavaScript Client. Prior to 2.8.0, W3CBaggagePropagator.extract() in @opentelemetry/core does not enforce size limits when parsing inbound baggage HTTP headers. The W3C Baggage specification recommends a maximum of 8,192 bytes and 180 entries; these limits were only enforced on the outbound (inject()) path, not on the inbound (extract()) path. Parsing oversized baggage causes memory allocation proportional to the header size without any cap. This vulnerability is fixed in 2.8.0.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
@opentelemetry/corenpm
< 2.8.02.8.0

Affected products

37

Patches

Vulnerability mechanics

References

3

News mentions

0

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