Search/CVE-2026-54271
● CVE — High

CVE-2026-54271

Vendorprotobufjs projectProductprotobufjs-cliDiscoveredJun 22, 2026UpdatedOct 25, 2026

protobufjs-cli is the command line add-on for protobuf.js. Prior to 1.3.2 and 2.5.0, a previous fix for unsafe name handling in pbjs static / static-module code generation was incomplete. Affected versions of protobufjs-cli could still emit unsafe JavaScript references when generating static output from crafted JSON descriptor input. The common case of parsing schemas from .proto files is not affected. This is a bypass of CVE-2026-44295. An attacker who can provide or influence pre-parsed JSON descriptors passed to pbjs static code generation may be able to cause generated JavaScript output to contain attacker-controlled code. The injected code may execute if the generated file is later executed or imported and an affected generated API path is invoked. This vulnerability is fixed in…

CVSS v3.1
8.2 HIGH
EPSS
0.30%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityHIGH
Privileges RequiredNONE
User InteractionREQUIRED
ScopeCHANGED
ConfidentialityHIGH
IntegrityHIGH
AvailabilityLOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L
Connections
2 relationships
Timeline
disclosure → media coverage
Jun 22, 2026
Disclosure — published as a CVE record. · last revised by NVD Oct 25, 2026