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CVE-2026-54285— opentelemetry-js: Unbounded memory allocation in W3C Baggage propagation

Quick assessment

Affected
open-telemetry opentelemetry-js
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

open-telemetry opentelemetry-js是open-telemetry组织的 OpenTelemetry JS 2.8.0之前版本存在资源管理错误漏洞，该漏洞源于W3CBaggagePropagator.extract()中未强制设置解析入站baggage HTTP标头时的大小限制，可能导致解析过大baggage时无上限分配内存。

CVSS 5.3 · Medium EPSS 0.40% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
open-telemetry opentelemetry-js < 2.8.0 affected
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I. Basic Information for CVE-2026-54285

Vulnerability Information
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Vulnerability Title
opentelemetry-js: Unbounded memory allocation in W3C Baggage propagation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
OpenTelemetry JS 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
open-telemetry opentelemetry-js是open-telemetry组织的 OpenTelemetry JS 2.8.0之前版本存在资源管理错误漏洞，该漏洞源于W3CBaggagePropagator.extract()中未强制设置解析入站baggage HTTP标头时的大小限制，可能导致解析过大baggage时无上限分配内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
open-telemetry opentelemetry-js < 2.8.0 -

II. Public POCs for CVE-2026-54285

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III. Intelligence Information for CVE-2026-54285

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Vendor Advisories for CVE-2026-54285 (1)

IV. Related Vulnerabilities

Same product: opentelemetry-js
Same vendor: open-telemetry
Same weakness: CWE-770

V. Comments for CVE-2026-54285

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