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Fencer Intel
medium 5.3

CVE-2026-59877 json

protobufjs: Denial of Service via infinite loop in .proto option parsing

published 4mo ago modified 17d ago also EUVD-2026-42310 , GHSA-j3f2-48v5-ccww

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm protobufjs 7.6.5, 8.6.6
  • protobufjs_project protobufjs 7.6.5, 8.6.6
  • rh-podman-desktop RHEL 10.2 1.1.2-1.el10_2

red hat advisories RHSA-2026:57590

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-59877 updated cvss 7.5

protobufjs: protobufjs: Denial of Service via crafted .proto schema

  • Red Hat OpenShift Pipelines openshift-pipelines/pipelines-console-plugin-rhel8, openshift-pipelines/pipelines-console-plugin-rhel9, openshift-pipelines/pipelines-console-plugin-pf5-rhel9
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 2 automation-platform-ui 2.6.10-1.el9ap Red Hat Build of Podman Desktop rh-podman-desktop.git
    affected: workaround, no fix available
  • Red Hat Ceph Storage 9 rhceph/alloy-rhel10
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/disk-image-cuda-rhel9
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 5 openshift5/ose-console-rhel9 Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel9
    affected: workaround, no fix available
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-grafana-dashboard-rhel9 4.2.0-14
    fixed: vendor fix RHSA-2026:68333
  • Red Hat Ansible Automation Platform 2.1 ansible-automation-platform/automation-portal 1785854226
    fixed: vendor fix RHSA-2026:50850
  • Red Hat Ansible Automation Platform 2.2 ansible-automation-platform/automation-portal 1785857303, ansible-automation-platform/bootc-automation-portal-rhel9 1786006573
    fixed: vendor fix RHSA-2026:50839
show 14 more
  • Red Hat Ansible Automation Platform 2.6 ansible-automation-platform-26/gateway-rhel9 1789666472
    fixed: vendor fix RHSA-2026:71179
  • Red Hat Ansible Automation Platform 2.7 ansible-automation-platform-27/gateway-rhel9 1788918510
    fixed: vendor fix RHSA-2026:67279
  • Red Hat Developer Hub 1.9 rhdh/rhdh-hub-rhel9 1785972843
    fixed: vendor fix RHSA-2026:52768
  • Red Hat Developer Hub 1.10 rhdh/rhdh-hub-rhel9 1785411652, rhdh/red-hat-developer-hub-backstage-plugin-lightspeed-backend 1785332487, rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend 1785332825
    fixed: vendor fix RHSA-2026:48126
  • Red Hat Enterprise Linux Extensions Channel (v. 10) rh-podman-desktop 1.1.2-1.el10_2
    fixed: vendor fix RHSA-2026:57590
  • Red Hat OpenShift Container Platform 4.21 openshift4/ose-console-rhel9 1787590523
    fixed: vendor fix RHSA-2026:60477
  • Red Hat OpenShift Container Platform 4.22 openshift4/ose-console-rhel9 1787158341
    fixed: vendor fix RHSA-2026:57365
  • Red Hat OpenShift Dev Spaces 3.30 devspaces/code-rhel9 1787762793
    fixed: vendor fix RHSA-2026:62260
  • Red Hat OpenShift Service Mesh 3.3 openshift-service-mesh/kiali-rhel9 1784806326, openshift-service-mesh/kiali-ossmc-rhel9 1784824388
    fixed: vendor fix RHSA-2026:49680
  • Red Hat OpenShift Service Mesh 3.4 openshift-service-mesh/kiali-rhel9 1784806708, openshift-service-mesh/kiali-ossmc-rhel9 1784824894
    fixed: vendor fix RHSA-2026:49735
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-rhel9 4.2.0-14, cryostat/cryostat-db-rhel9 4.2.0-22, cryostat/jfr-datasource-rhel9 4.2.0-14, cryostat/cryostat-reports-rhel9 4.2.0-14, cryostat/cryostat-storage-rhel9 4.2.0-22, cryostat/cryostat-rhel9-operator 4.2.0-21, +3 more Red Hat Ansible Automation Platform 2.6 ansible-automation-platform-26/hub-rhel9 1789611274, ansible-automation-platform-26/hub-web-rhel9 1789615881, ansible-automation-platform-26/receptor-rhel9 1789610120, ansible-automation-platform-26/mcp-tools-rhel9 1789609282, ansible-automation-platform-26/controller-rhel9 1789673739, ansible-automation-platform-26/de-minimal-rhel9 1789658734, +24 more Red Hat Ansible Automation Platform 2.7 ansible-automation-platform-27/hub-rhel9 1788918708, ansible-automation-platform-27/hub-web-rhel9 1788924567, ansible-automation-platform-27/receptor-rhel9 1788918370, ansible-automation-platform-27/mcp-tools-rhel9 1788917342, ansible-automation-platform-27/controller-rhel9 1788918363, ansible-automation-platform-27/de-minimal-rhel9 1788920534, +25 more Red Hat Developer Hub 1.9 rhdh/rhdh-rhel9-operator 1785972533, rhdh/rhdh-operator-bundle 1785976147 Red Hat Developer Hub 1.10 rhdh/rhdh-rhel9-operator 1785411290, rhdh/rhdh-operator-bundle 1785415596, rhdh/rhdh-must-gather-rhel9 1784202439, rhdh/rhdh-rag-content-rhel9 1785162496, rhdh/red-hat-developer-hub-backstage-plugin-lightspeed 1785333413, rhdh/red-hat-developer-hub-backstage-plugin-orchestrator 1785340831, +3 more
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 8 grafana, grafana-loki, grafana-mssql, grafana-mysql, grafana-selinux, grafana-graphite, +8 more
    not affected: vulnerable code not in execute path
  • Red Hat Hardened Images dotnet9.0 9.0.118-1.hum1
    not affected: component not present
  • Red Hat OpenShift Container Platform 4 openshift4/ose-console Red Hat OpenShift Container Platform 4.21 openshift4/frr-rhel9 1787555870, openshift4/ose-cli-rhel9 1787556246, openshift4/ose-pod-rhel9 1787558631, openshift4/ose-etcd-rhel9 1787562282, openshift4/ose-tests-rhel9 1787563149, openshift4/ose-tools-rhel9 1787557205, +181 more Red Hat OpenShift Container Platform 4.22 openshift4/frr-rhel9 1786964976, openshift4/ose-cli-rhel9 1786965815, openshift4/ose-pod-rhel9 1787118353, openshift4/ose-etcd-rhel9 1786971601, openshift4/ose-tests-rhel9 1787012092, openshift4/ose-tools-rhel9 1787010320, +182 more Red Hat OpenShift Dev Spaces 3.30 devspaces/udi-rhel9 1787764814, devspaces/server-rhel9 1787757597, devspaces/openvsx-rhel9 1787759145, devspaces/traefik-rhel9 1787756799, devspaces/udi-base-rhel9 1787761882, devspaces/code-sshd-rhel9 1787762385, +10 more Red Hat OpenShift Service Mesh 3.4 openshift-service-mesh/kiali-rhel9-operator 1784795355, openshift-service-mesh/kiali-operator-bundle 1784923616
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
4mo ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm protobufjs
>=7.5.0, <7.6.5
>=8.0.0, <8.6.6
7.6.5
8.6.6

Affected products

  • protobufjs protobuf.js

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of protobufjs/protobuf.js published their own advisory on GitHub. Reviewed sources take precedence over it.