Dashboard / CVE-2026-76844

CVE-2026-76844

HIGH 1 PoC
MEDIUM Priority: 0.05 BB Relevance: 77/100
Published: 2026-08-24 Modified: 2026-11-13 First seen: 2026-11-13 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Passive
S: X
AT: None
VC: High
VI: None
VA: None

Description

webpack-dev-middleware 5.3.4, 6.1.2 through 6.1.3, 7.1.0 before 7.4.6, and 8.0.0 before 8.3.0 contains a path traversal vulnerability in getFilenameFromUrl that bypasses the fix for CVE-2024-29180: a publicPath without a trailing slash is matched by string prefix, and the '..' guard runs before that prefix is stripped. Unauthenticated attackers can request a path such as /assets../secret to read files one directory above the output directory when the middleware serves from the physical filesystem through writeToDisk or a custom outputFileSystem.

Weakness Classification (1)

Affected Software (4)

VendorProductVersion
webpack webpack-dev-middleware 5.3.4
webpack webpack-dev-middleware 6.1.2
webpack webpack-dev-middleware 7.1.0 < 7.4.6
webpack webpack-dev-middleware 8.0.0 < 8.3.0

References & Advisories (9)

Proof of Concept (1)

—
https://github.com/perplexedyawdie/cve-2026-76844-lab
nomi-sec

Bug Bounty Relevance

77 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ PoC available (1)

CVSS Score

8.3 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/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

EPSS — Exploitation Probability

0.59%
Raw Score 0.005920
Percentile 48.9%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00592
2026-11-12
0.00592

Intelligence Sources

mitre ref →
nvd ref →

External Links