How serious is CVE-2026-27479?

This vulnerability has a CVSS score of 7.7 out of 10, classified as HIGH severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-27479?

Yes, proof-of-concept exploit code for CVE-2026-27479 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-27479?

CVE-2026-27479 affects wallosapp wallos. Check the full CVE details for specific version information.

How do I fix CVE-2026-27479?

To remediate CVE-2026-27479, check for security patches from wallosapp. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-27479

High

|7.7

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

An attacker can exploit a vulnerability in Wallos to trick the application into accessing internal resources, such as sensitive cloud metadata, by using specially crafted URLs that redirect to these resources. This requires the attacker to provide a URL that the application initially accepts, as it only checks the IP address of the first request and not any subsequent redirects.

Technical Description

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.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactNone

Availability ImpactNone

ScopeChanged

Vector String

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

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$2,474($1K-$5K)

Vendor Response

Grade APatched in 3 days

Quick Information

Published

Feb 21, 2026

about 2 months ago

Last Modified

Feb 24, 2026

about 1 month ago

Vendor

wallosapp

Product

wallos