What is the CVSS score of CVE-2026-27839?

CVE-2026-27839 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Wger are affected by CVE-2026-27839?

Organizations using versions should be aware of moderate risk from CVE-2026-27839, a IDOR vulnerability rated CVSS 4.3. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2026-27839?

Yes, a public proof-of-concept exploit is available for CVE-2026-27839. Prioritise patching immediately. EPSS: 0.0%.

Wger CVE-2026-27839

MEDIUM

Authorization Bypass Through User-Controlled Key (CWE-639)

2026-02-26 security-advisories@github.com

GHSA-g8gc-6c4h-jg86

Authentication Bypass Wger

4.3

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.3 MEDIUM

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:56 vuln.today

PoC Detected

Mar 03, 2026 - 00:49 vuln.today

Public exploit code

Patch released

Mar 03, 2026 - 00:49 nvd

Patch available

CVE Published

Feb 26, 2026 - 23:16 nvd

MEDIUM 4.3

DescriptionGitHub Advisory

wger is a free, open-source workout and fitness manager. In versions up to and including 2.4, 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. Commit 29876a1954fe959e4b58ef070170e81703dab60e contains a fix for the issue.

AnalysisAI

Wger versions up to 2.4 allow authenticated users to access other users' private nutrition plans through insecure direct object references in the nutritional_values endpoints, exposing sensitive dietary data including caloric intake and macronutrient breakdowns. The vulnerability stems from bypassing user-scoped querysets via direct primary key lookups, and public exploit code is available.

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Vulnerability AssessmentAI

Risk Assessment	CVSS 4.3 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker (requires authentication) could exploit this vulnerability to compromise the affected system.
Remediation	A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

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Within 30 days: Identify affected systems running versions and apply vendor patches as part of regular patch cycle. …

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CVE-2026-27839 vulnerability details – vuln.today

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Wger CVE-2026-27839

Severity by source

CVSS VectorGitHub Advisory

Lifecycle Timeline

DescriptionGitHub Advisory

AnalysisAI

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External POC / Exploit Code