CVE-2026-86256Public exploitNetwork attack vector

Trainer phishing via unvalidated redirect target

Published Sep 6, 2026 · Updated Sep 9, 2026

Open redirect in wger before 2.6 allows remote attackers to send authenticated trainers to an external site through a crafted link. The trainer_login view passes the next GET parameter directly to HttpResponseRedirect without validating its host or scheme. Exploitation requires trainer impersonation access and a link click, enabling phishing and Referer disclosure of the impersonated user identifier.

CVSS severity5.1
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in wger before 2.6 allows remote attackers to send authenticated trainers to an external site through a crafted link. The trainer_login view passes the next GET parameter directly to HttpResponseRedirect without validating its host or scheme. Exploitation requires trainer impersonation access and a link click, enabling phishing and Referer disclosure of the impersonated user identifier.

The record

CVE
CVE-2026-86256
Published
Sep 6, 2026
Updated
Sep 9, 2026
Vendor
wger Project
Product
wger
Classifications
CWE-601, T1566.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 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=0 <2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

wger Project · wgerversion=0 <2.6

Published CVSS scores

5.1VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
5.4GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1566.002Spearphishing Link

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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