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CVE-2018-3738

20
FAUCET Score

CVE-2018-3738 describes a Regular Expression Denial of Service (ReDoS) vulnerability in the protobufjs library, affecting protobufjs_project protobufjs. This medium-severity vulnerability (CVSS 5.5) can be triggered when parsing specially crafted, invalid .proto files, leading to a denial of service (availability impact) on the affected system. The attack requires user interaction (UI:R) and local access (AV:L). Currently, there is no evidence of active exploitation, nor are there any publicly available exploit tools like Metasploit or ExploitDB entries, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.8.5CPE matchmatch criteria
cpe:2.3:a:protobufjs_project:protobufjs:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.96%
Probability of exploitation in next 30 days
EPSS Percentile
57.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0096 is in the 68th percentile among its peer group of 5,765 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

npmpatch availablevia ghsa
Product: protobufjsFixed in: 6.8.6
npmpatch availablevia ghsa
Product: protobufjsFixed in: 5.0.3

Vendor Advisories (1)

npmGHSA-762f-c2wg-m8c8medium

Denial of Service in protobufjs

Oct 9, 2018

References

hackerone.com / reports/319576
ExploitThird Party Advisory