CVE-2026-59877: protobufjs before 7.6.5 (exclusive), from 8.0.0 (inclusive), before 8.6.6 (exclusive); +1 more affected products

CVE-2026-59877. CVSS 3.1 base score 7.5 (HIGH, NVD). EPSS 0.00365 (percentile 0.29259), scored 24-Oct-2026.

Affected technology

protobufjs · before 7.6.5 (exclusive)
protobufjs project

protobufjs · from 8.0.0 (inclusive), before 8.6.6 (exclusive)
protobufjs project

protobuf.js · >= 7.5.0, < 7.6.5, >= 8.0.0, < 8.6.6
protobufjs

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Vendor/CNA’s CVSS 3.1 assessment (base score 5.3/10) rates confidentiality and integrity impact as none; availability impact as low. NVD’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 25-Oct-2026 19:52 UTC

CWE: CWE-835
CCR priority: 30.1 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · NVD
EPSS: 0.00365 · percentile 0.30117 · 2026-10-25
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-25 19:52:47.952465+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-25 19:51:06.643138+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-59877.html