Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-54285

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 27.0%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-54285


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