CVE-2026-35477 - InvenTree has SSTI in PART_NAME_FORMAT bypasses CVE-2026-27629 fix via {% if part.pk %} sandbox escape

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CRITICAL

InvenTree has SSTI in PART_NAME_FORMAT bypasses CVE-2026-27629 fix via {% if part.pk %} sandbox escape

Published Apr 8, 2026

9.9

CRITICAL

CVSS 3.1

EPSS 0.36%

Description

InvenTree is an Open Source Inventory Management System. From 1.2.3 to 1.2.6, the fix for CVE-2026-27629 upgraded the PART_NAME_FORMAT validator to use jinja2.sandbox.SandboxedEnvironment. However, the actual renderer in part/helpers.py was not updated and still uses the non-sandboxed jinja2.Environment. Additionally, the validator uses a dummy Part instance with pk=None, which allows conditional template expressions to behave differently during validation versus production rendering. A staff user with settings access can craft a template that passes validation but executes arbitrary code during rendering. This issue requires access by a user with granted staff permissions. This vulnerability is fixed in 1.2.7 and 1.3.0.

Affected products

Vendor Inventree Product InvenTree Default
n/a
- Version
  >= 1.2.3, < 1.2.7
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Inventree

InvenTree

n/a

Version	Status	Constraints
>= 1.2.3, < 1.2.7	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-1336

References (2)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-20588
Advisory
https://github.com/inventree/InvenTree/security/advisories/GHSA-84jh-x777-8pqq
x_refsource_CONFIRMThird Party Advisory

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-20588		Advisory
https://github.com/inventree/InvenTree/security/advisories/GHSA-84jh-x777-8pqq		x_refsource_CONFIRMThird Party Advisory