Wallos
CVE-2026-27479
HIGH
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/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:C/C:H/I:N/A:N
Lifecycle Timeline
4DescriptionGitHub Advisory
Wallos is an open-source, self-hostable personal subscription tracker. Versions 4.6.0 and below contain a Server-Side Request Forgery (SSRF) vulnerability in the subscription and payment logo/icon upload functionality. The application validates the IP address of the provided URL before making the request, but allows HTTP redirects (CURLOPT_FOLLOWLOCATION = true), enabling an attacker to bypass the IP validation and access internal resources, including cloud instance metadata endpoints. The getLogoFromUrl() function validates the URL by resolving the hostname and checking if the resulting IP is in a private or reserved range using FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE. However, the subsequent cURL request is configured with CURLOPT_FOLLOWLOCATION = true and CURLOPT_MAXREDIRS = 3, which means the request will follow HTTP redirects without re-validating the destination IP. This issue has been fixed in version 4.6.1.
AnalysisAI
Wallos versions 4.6.0 and below allow authenticated attackers to perform Server-Side Request Forgery attacks through the logo upload feature by exploiting HTTP redirects that bypass IP validation checks, enabling access to internal resources and cloud metadata endpoints. Public exploit code exists for this vulnerability, and an available patch should be applied immediately to prevent unauthorized disclosure of sensitive configuration and credentials.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Wallos versions 4.6.0 and below with CURLOPT_FOLLOWLOCATION enabled in getLogoFromUrl() function. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.7 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker 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. |
Recommended ActionAI
Within 24 hours: identify all instances of Wallos in your environment and confirm versions. …
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