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TI-2026-21886 Aliases CVE-2026-27479

Wallos: SSRF via Redirect Bypass in Logo/Icon URL Fetch

Priority HIGH 67CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0035 28th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Wallos (ellite): 4.6.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
elliteWallosbefore 4.6.14.6.1Patch availableCNA
  • Wallos Vendorellite Affected before 4.6.1 Fixed in 4.6.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:wallosapp:wallos:*:*:*:*:*:*:*:*before 4.6.1Vulnerableellite
  • cpe:2.3:a:wallosapp:wallos:*:*:*:*:*:*:*:* Versions before 4.6.1 Vulnerable ·ellite

Remediation

  • Fix · CNA Wallos (ellite) Fixed in 4.6.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27479

References

Exploit 1

Patch 1

Other 1

  • TI-2026-25804 Wallos: SSRF via HTTP Proxy Environment Variable CVSS 4.0HIGH 8.3
  • TI-2026-23669 Wallos: Server-Side Request Forgery (SSRF) in Notification Testers CVSS 3.0HIGH 8.8
  • TI-2024-19429 Wallos before 1.15.3 is vulnerable to SQL Injection via the category and payment parameters to /subscriptions/get.php. CVSS 3.1HIGH 8.1
  • TI-2026-25796 Wallos: SSRF Bypass - Incomplete Fix for CVE-2026-30839/30840 CVSS 3.1HIGH 7.7
  • TI-2026-25814 Wallos: Password Reset Tokens Never Expire CVSS 3.1HIGH 7.1
  • TI-2026-25798 Wallos: Incomplete fix for CVE-2026-30840 - SSRF in AI and notification endpoints bypass ssrf_helper.php CVSS 4.0HIGH 7.1
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences