CVE-2026-54285: opentelemetry-js is the OpenTelemetry JavaScript Client

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-54285 is a medium-severity flaw (CVSS 5.3) affecting opentelemetry. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-770
Published	2026-06-22
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: opentelemetry

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-22 18:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

opentelemetry opentelemetry UPGRADE

Affected: < 2.8.0

Fixed in: 2.8.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls opentelemetry

2. UPGRADE to 2.8.0

npm install opentelemetry@">=2.8.0"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-54285?

opentelemetry: upgrade to 2.8.0. Exact commands for each OS are on this page.

Is CVE-2026-54285 being exploited?

CVE-2026-54285 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-54285 affect?

CVE-2026-54285 affects opentelemetry. Severity is medium (CVSS 5.3). 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

How urgent is CVE-2026-54285?

Priority 32/100. Remotely exploitable, no login, no user action

References

← Back to latest CVEs