CVE-2026-27838Public exploitNetwork attack vector

Workout-data disclosure via user-unscoped routine cache keys

Published Feb 26, 2026 · Updated Feb 26, 2026

Authorization bypass in wger 2.4 and earlier allows remote authenticated users to read other users' routine details through the API. Five routine action handlers in wger/manager/api/views.py return responses cached only by routine primary key before self.get_object() enforces ownership. Exploitation requires a registered account, knowledge of a routine identifier, and a victim-populated cache entry, exposing workout sequences, structure, logs, and statistics.

CVSS severity3.1
Low
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in wger 2.4 and earlier allows remote authenticated users to read other users' routine details through the API. Five routine action handlers in wger/manager/api/views.py return responses cached only by routine primary key before self.get_object() enforces ownership. Exploitation requires a registered account, knowledge of a routine identifier, and a victim-populated cache entry, exposing workout sequences, structure, logs, and statistics.

The record

CVE
CVE-2026-27838
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
wger Project
Product
wger
Classifications
CWE-639
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

wger Project · wgerversion=<= 2.4

Published CVSS scores

3.1GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
3.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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