Horilla: Server-Side Template Injection (SSTI) in Mail Preview Endpoints Allows Authenticated Users to Disclose Password Hashes and Server Metadata (CVE-2026-63432) | HOL Guard CVE

Medium · CVSS 6.5CVE-2026-63432

Horilla: Server-Side Template Injection (SSTI) in Mail Preview Endpoints Allows Authenticated Users to Disclose Password Hashes and Server Metadata

Answer in brief

CVE-2026-63432 records a Medium severity (CVSS 6.5) vulnerability in Horilla: Server-Side Template Injection (SSTI) in Mail Preview Endpoints Allows Authenticated Users to Disclose Password Hashes and Server Metadata. The current sources do not mark it as known exploited. The current feed maps horilla/horilla-hr (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 26, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps horilla/horilla-hr (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
horilla/horilla-hrgeneric	>=1.0.0 <1.6.0 \|\| >=2.0.0-beta.1 <2.0.0	1.6.0, 2.0.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for horilla/horilla-hr.
Review the reported fix. Update horilla/horilla-hr to 1.6.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

Horilla is an HR and CRM software. From 1.0.0 until 1.6.0 and 2.0.0, the get_mail_preview handlers in recruitment/views/actions.py and employee/not_in_out_dashboard.py render a user-controlled body at /recruitment/get-mail-preview/ and /employee/get-employee-mail-preview with the full request object in the Django template context. An authenticated user with a valid CSRF token can use template attribute traversal to read request.user.password, request.META, and related-user attributes, exposing password hashes, personal data, and server request metadata. Django template restrictions prevent arbitrary code execution through this primitive, so the demonstrated impact is information disclosure and possible offline password cracking or account compromise. This issue is fixed in versions 1.6.0 and 2.0.0.

Quoted source text, attributed separately from HOL analysis.