7.5

CVE-2026-59877: protobufjs_project protobufjs Infinite Loop

CVSS: 7.5v3.1HighAnalyzed
AliasesCGA-658m-p256-mxhxCGA-7hh6-69gc-jrw8CGA-fjww-4296-43rp
Published 08-07-2026Last modified 08-07-2026
Open JSON

Vulnerability summary

CVE-2026-59877 is a high (CVSS 7.5) Infinite Loop vulnerability in protobufjs_project protobufjs. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 51.2% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.67%
0%100%
Low · +0.31 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
RHSA-2026:57590CGA-5QXF-RH36-3G5W

Timeline

  1. 08-07-2026
    PublishedVulnerability first disclosed.
  2. 08-07-2026
    Last modifiedVulnerability information updated.

Description

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.6.5 and 8.6.6, protobufjs parsed option names by advancing through schema tokens until reaching an = token without checking for end of input, so a crafted .proto schema that opens an option declaration and ends prematurely can cause parse, Root.load, or Root.loadSync to loop indefinitely. This issue is fixed in versions 7.6.5 and 8.6.6.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.67%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

+0.31 pp

From 0.36% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.67%

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

Chainguard19 products
  • cadence-web< 4.0.16-r2
  • homepage< 1.13.2-r5
  • jitsucom-jitsu-console< 2.11.0-r30
  • kibana-9.0< 9.0.8-r34
  • kibana-9.0-bitnami< 9.0.8-r34
Wolfi5 products
  • jitsucom-jitsu-console< 2.11.0-r30
  • kubeflow-centraldashboard< 1.10.0-r25
  • pulumi-language-nodejs< 3.253.0-r2
  • vitess-24< 24.0.2-r6
  • vitess-24-compat< 24.0.3-r7
Npm1 product
  • protobufjs≥ 7.5.0, < 7.6.5 | ≥ 8.0.0, < 8.6.6
Protobufjs1 product
Protobufjs_project1 product

5 vendors · 27 products

References

9 links