Cyber Resilience

CVE-2026-72835

Public PoC
Published
14 August 2026
Modified
14 August 2026
CVSS Score v4 7.6
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/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 Score 0.0034 26th percentile
Risk Priority 30 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-72835 is a high-severity Improper Resolution of Path Equivalence (CWE-41) vulnerability. Its CVSS base score is 7.6 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Data from Local System (T1005); ranked at the 26th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) and AC-3 (Access Enforcement) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

filebrowser versions before v2.63.21 fail to canonicalize paths before evaluating access rules, allowing authenticated users to bypass administrator-defined deny rules using case-variant or backslash-separated paths. Attackers can request files with alternate path representations that match no rule but resolve to…

more

the same filesystem object, gaining unauthorized access to denied files within their scope.

CWE(s)
CWE-41

Related Threats

MITRE ATT&CK Enterprise Techniques

T1005 Data from Local System Collection
Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.
attack.mitre.org →
T1083 File and Directory Discovery Discovery
Adversaries may enumerate files and directories or may search in specific locations of a host or network share for certain information within a file system.
attack.mitre.org →
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 →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-24470Shared CWE-41
CVE-2025-21329Shared CWE-41
CVE-2025-21268Shared CWE-41
CVE-2025-43298Shared CWE-41
CVE-2026-50568Shared CWE-41
CVE-2025-0115Shared CWE-41
CVE-2026-5816Shared CWE-41
CVE-2025-21269Shared CWE-41
CVE-2024-6839Shared CWE-41
CVE-2025-21247Shared CWE-41

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

Input validation of file paths directly rejects or normalizes the special-character manipulations that create equivalent names.

AC-3 Access Enforcement partial match

Proper enforcement of file access authorizations structurally blocks disclosure when equivalent paths are presented.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly prevent introduction of improper path-resolution logic in software.

PR.IR-01 partial match
prevents

Path-equivalence flaws enable unauthorized file access that network segmentation and logical access controls can partially block.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding mostly match
prevents

Secure coding standards directly require canonical path resolution and input sanitization to prevent equivalence attacks.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect path-equivalence flaws before release, partially fulfilling the control.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle includes path-handling requirements that reduce equivalence-based disclosure.

A.8.26 Application security requirements partial match
prevents

Application security requirements can mandate canonicalization and input validation to block path equivalence.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles call for safe file-system abstractions that mitigate path traversal risks.

References