High severity · published May 27, 2026
CVE-2026-44902
opentelemetry-js: Prometheus exporter process crash via malformed HTTP request
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
opentelemetry-js is the OpenTelemetry JavaScript Client. Prior to 0.217.0, a single malformed HTTP request crashes any Node.js process running the OpenTelemetry JS Prometheus exporter. The metrics endpoint (default 0.0.0.0:9464) has no error handling around URL parsing, so a request with an invalid URI causes an uncaught TypeError that terminates the process. This vulnerability is fixed in 0.217.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AU
auto-instrumentations-node · @opentelemetry
< 0.75.0 · source: vendor
EX
exporter-prometheus · @opentelemetry
< 0.217.0 · source: vendor
OP
opentelemetry-js · open-telemetry
< 0.217.0 · source: vendor
SD
sdk-node · @opentelemetry
< 0.217.0 · source: vendor
OP
Opentelemetry/auto-instrumentations-node · Opentelemetry
before 0.75.0 · source: NVD
OP
Opentelemetry/exporter-prometheus · Opentelemetry
before 0.217.0 · source: NVD
OP
Opentelemetry/sdk-node · Opentelemetry
before 0.217.0 · source: NVD