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CVE-2026-43978— wger: Privilege escalation via trainer-login session chaining allows gym trainers to impersonate gym managers

Quick assessment

Affected
wger-project wger
Exploitation
Public or AI PoC available; prioritize validation
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团队开源的一款自托管健身、营养和体重追踪器。 wger 2.6之前版本存在权限许可和访问控制问题漏洞，该漏洞源于权限许可和访问控制问题，可能导致健身教练通过两次调用trainer-login端点，将会话升级到任何高权限账户，从而获得完整的健身房管理能力，包括查看所有会员数据、修改合同、管理健身房配置以及访问其他教练和管理员的个人信息。

CVSS 8.1 · High EPSS 0.37% · P29

Affected Version Matrix 1

VendorProduct Version RangeStatus
wger-project wger < 2.6 affected
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I. Basic Information for CVE-2026-43978

Vulnerability Information
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Vulnerability Title
wger: Privilege escalation via trainer-login session chaining allows gym trainers to impersonate gym managers
Source: CVE Program / CVE List V5
Vulnerability Description
wger is a free, open-source workout and fitness manager. In versions prior to 2.6, a gym trainer can escalate their session to any higher-privileged account (gym manager, general manager) by chaining two calls to the trainer-login endpoint. Once a trainer performs a legitimate switch into a low-privileged user, the session flag trainer.identity is set and this flag alone bypasses the permission check on all subsequent trainer-login calls. This grants full gym administration capabilities including viewing all member data, modifying contracts, managing gym configuration, and accessing other trainers' and managers' personal information. This issue has been fixed in version 2.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
wger 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
wger是wger团队开源的一款自托管健身、营养和体重追踪器。 wger 2.6之前版本存在权限许可和访问控制问题漏洞，该漏洞源于权限许可和访问控制问题，可能导致健身教练通过两次调用trainer-login端点，将会话升级到任何高权限账户，从而获得完整的健身房管理能力，包括查看所有会员数据、修改合同、管理健身房配置以及访问其他教练和管理员的个人信息。
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 < 2.6 -

II. Public POCs for CVE-2026-43978

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 11040 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Trigger conditions & impact
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-43978

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Vendor Advisories for CVE-2026-43978 (1)

IV. Related Vulnerabilities

Same product: wger
Same vendor: wger-project
Same weakness: CWE-269

V. Comments for CVE-2026-43978

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