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Halo CMS CVE-2026-15326

| EUVDEUVD-2026-42782 LOW
Path Traversal (CWE-22)
2026-07-10 VulDB GHSA-9p22-639x-ghp4
Java Path Traversal Halo
2.0
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.0 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
vuln.today AI
3.8 LOW

Theme installation is admin-only (PR:H); impact limited to partial file write (I:L) and minor disruption (A:L) with no confidentiality exposure (C:N).

3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Jul 10, 2026 - 04:26 vuln.today
Severity Changed
Jul 10, 2026 - 04:22 NVD
MEDIUM LOW
CVSS changed
Jul 10, 2026 - 04:22 NVD
5.1 (MEDIUM) 2.0 (LOW)

DescriptionCVE.org

A vulnerability was identified in halo-dev halo up to 2.24.2. This affects the function ThemeUtils.unzipThemeTo of the file ThemeUtils.java of the component Theme Installation. Such manipulation of the argument metadata.name leads to path traversal. The attack may be launched remotely. The exploit is publicly available and might be used. The project closed the issue as "duplicate" but did not reference any other issue, report, or CVE.

AnalysisAI

Path traversal in halo-dev/halo through version 2.24.2 allows authenticated administrators to write files outside the intended theme directory by supplying a crafted metadata.name value during theme installation. The flaw resides in the ThemeUtils.unzipThemeTo() function in ThemeUtils.java, which fails to sanitize the metadata name before constructing extraction paths. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain or compromise admin credentials
Delivery
Authenticate to Halo admin panel
Exploit
Craft theme ZIP with traversal sequences in metadata.name
Execution
Upload malicious theme via theme installation UI
Persist
ThemeUtils.unzipThemeTo() writes files to traversal-specified path
Impact
Arbitrary file write achieved on server filesystem
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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated session with administrator-level privileges in Halo CMS, as the theme installation interface is restricted to admin users. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 2.0 accurately reflects a low real-world priority. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has obtained or compromised an administrator account logs into the Halo admin panel and uploads a maliciously crafted theme ZIP archive in which the `metadata.name` field contains directory traversal sequences. The `ThemeUtils.unzipThemeTo()` function processes the archive and extracts files to the traversal-specified path, potentially overwriting application configuration files or placing a malicious file (such as a JSP web shell) in a web-accessible directory. …
Remediation No vendor-released patch has been confirmed at time of analysis - the GitHub issue (https://github.com/halo-dev/halo/issues/10062) was closed as a 'duplicate' with no reference to a fix, alternative CVE, or patched release. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-15326 vulnerability details – vuln.today
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