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CVE-2026-27838— wger: IDOR via user-unscoped cache keys on routine API actions exposes workout data

Quick assessment

Affected
wger-project wger
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

wger是wger Project开源的使用 Django 编写的自托管 FLOSS 健身/锻炼、营养和体重追踪器。 wger 2.4及之前版本存在安全漏洞，该漏洞源于缓存键范围不当，可能导致未经授权的数据访问。

CVSS 3.1 · Low EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys
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I. Basic Information for CVE-2026-27838

Vulnerability Information
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Vulnerability Title
wger: IDOR via user-unscoped cache keys on routine API actions exposes workout data
Source: CVE Program / CVE List V5
Vulnerability Description
wger is a free, open-source workout and fitness manager. Five routine detail action endpoints check a cache before calling `self.get_object()`. In versions up to and including 2.4, ache keys are scoped only by `pk` — no user ID is included. When a victim has previously accessed their routine via the API, an attacker can retrieve the cached response for the same PK without any ownership check. Commit e964328784e2ee2830a1991d69fadbce86ac9fbf contains a patch for the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
wger 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
wger是wger Project开源的使用 Django 编写的自托管 FLOSS 健身/锻炼、营养和体重追踪器。 wger 2.4及之前版本存在安全漏洞，该漏洞源于缓存键范围不当，可能导致未经授权的数据访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wger-project wger <= 2.4 -

II. Public POCs for CVE-2026-27838

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III. Intelligence Information for CVE-2026-27838

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Vendor Advisories for CVE-2026-27838 (1)

Same Patch Batch · wger-project · 2026-02-26 · 3 CVEs total

CVE-2026-27839 4.3 MEDIUM wger: IDOR in nutritional_values endpoints exposes private dietary data via direct ORM loo
CVE-2026-27835 4.3 MEDIUM wger: IDOR in RepetitionsConfig and MaxRepetitionsConfig API leak other users' workout dat

IV. Related Vulnerabilities

Same product: wger
Same vendor: wger-project
Same weakness: CWE-639

V. Comments for CVE-2026-27838

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