8.1

CVE-2026-44291: protobufjs_project protobufjs Code Injection

CVSS: 8.1v3.1HighAnalyzed
AliasesCGA-2gv7-fx6f-m9fqCGA-2h92-r6gv-6vp8CGA-84w8-x85c-99g4
Published 13-05-2026Last modified 13-05-2026
Open JSON

Vulnerability summary

CVE-2026-44291 is a high (CVSS 8.1) Code Injection vulnerability in protobufjs_project protobufjs. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 35% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.42%
0%100%
Low · -0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-WF86-6QRX-29PG

Timeline

  1. 13-05-2026
    PublishedVulnerability first disclosed.
  2. 13-05-2026
    Last modifiedVulnerability information updated.

Description

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs used plain objects with inherited prototypes for internal type lookup tables used by generated encode and decode functions. If Object.prototype had already been polluted, those lookup tables could resolve attacker-controlled inherited properties as valid protobuf type information. This could cause attacker-controlled strings to be emitted into generated JavaScript code. This vulnerability is fixed in 7.5.6 and 8.0.2.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.42%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

-0.08 pp

From 0.50% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.42%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard25 products
  • cadence-web< 4.0.15-r2
  • gemini-cli< 0.44.0-r0
  • homepage< 1.13.1-r3
  • kibana-8.19< 8.19.15-r0
  • kibana-8.19-bitnami< 8.19.15-r0
Wolfi4 products
  • kubeflow-centraldashboard< 1.10.0-r21
  • pulumi-language-nodejs< 3.237.0-r1
  • renovate< 43.170.15-r2
  • vitess-23< 23.0.4-r5
Npm1 product
  • protobufjs< 7.5.6 | ≥ 8.0.0, < 8.0.2
Protobufjs1 product
Protobufjs_project1 product

5 vendors · 32 products

References

6 links