CVE-2026-41242

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.77% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 53.3% of scored records. A rank, not a probability.

NVD base score

9.4 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Modified. NVD last modified this record on 2026-09-02.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-04-18 16:18Z4 MO AGO

Last updated

2026-09-02 12:04Z2 DAYS AGO

Reserved

2026-04-18

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Critical (CVSS 9.4)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Weaknesses

• CWE-94Improper Control of Generation of Code ('Code Injection')Base

Data version

5.2

Document digest

a680d6993c0bbdb176276cf433295414d741e503385befc8399fad3028643af4

• github.comhttps://github.com/protobufjs/protobuf.js/security/advisories/GHSA-xq3m-2v4x-88ggx_refsource_CONFIRM
• github.comhttps://github.com/protobufjs/protobuf.js/commit/535df444ac060243722ac5d672db205e5c531d75x_refsource_MISC
• github.comhttps://github.com/protobufjs/protobuf.js/commit/ff7b2afef8754837cc6dc64c864cd111ab477956x_refsource_MISC
• github.comhttps://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v7.5.5x_refsource_MISC
• github.comhttps://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.0.1x_refsource_MISC
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-41242vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2459442https://bugzilla.redhat.com/show_bug.cgi?id=2459442issue-trackingx_refsource_REDHAT
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41242.jsonx_sadp-csaf-vex
• access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:21338vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:26234vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:24977vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:37275vendor-advisoryx_refsource_REDHAT