CVE-2026-54285
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability35. percentile0.4%
Product
Opentelemetry
PublishedJun 22, 2026
First seenJun 22, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- opentelemetry opentelemetry2.8.0 or later
- @opentelemetry/core2.8.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| opentelemetry opentelemetry | v < 2.8.0 | 2.8.0 |
| @opentelemetry/corenpm | v < 2.8.0 | 2.8.0 |
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