CVE-2026-30996

High

Published: 15 April 2026

Published

15 April 2026

Modified

27 April 2026

KEV Added

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Patch

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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Score 0.0056 68.9th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-30996 is a high-severity Path Traversal (CWE-22) vulnerability in Joaopaulodeoliveira (inferred from references). Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 31.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).

Deeper analysis

CVE-2026-30996, published on 2026-04-15, is a directory traversal vulnerability (CWE-22) in the file handling logic of the download.php component within SAC-NFe version 2.0.02. The flaw enables attackers to read arbitrary files from the affected system by sending a crafted GET request. It carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), indicating high severity due to its potential for significant data exposure.

The vulnerability can be exploited by remote, unauthenticated attackers (PR:N) over the network (AV:N) with low attack complexity (AC:L) and without requiring user interaction (UI:N). Successful exploitation allows reading of sensitive arbitrary files, resulting in high confidentiality impact (C:H), but does not affect integrity (I:N) or availability (A:N).

Advisories providing further details are available at https://cve.joaopaulodeoliveira.dev/cve.php/published/CVE-2026-30996 and https://cve.joaopaulodeoliveira.dev/cve.php/reserved/softsul-path-transversal.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-22977

Vulnerability details

An issue in the file handling logic of the component download.php of SAC-NFe v2.0.02 allows attackers to execute a directory traversal and read arbitrary files from the system via a crafted GET request.

CWE(s): CWE-22

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Directory traversal in public-facing download.php component directly matches T1190 (Exploit Public-Facing Application) for remote unauthenticated file access.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1