CVE-2026-41688: CWE-918: Server-Side Request Forgery (SSRF) in ellite Wallos
Wallos is an open-source, self-hostable personal subscription tracker. In versions 4.8.4 and prior, the incomplete SSRF fix in Wallos validates webhook URLs via gethostbyname() but passes the original hostname to cURL without CURLOPT_RESOLVE pinning on 10 of 11 outbound HTTP endpoints, leaving a DNS rebinding TOCTOU window. At time of publication, there are no publicly available patches.
AI Analysis
Technical Summary
Wallos versions 4.8.4 and prior suffer from an SSRF vulnerability (CWE-918) due to an incomplete fix. While webhook URLs are validated via gethostbyname(), the application passes the original hostname to cURL without using CURLOPT_RESOLVE pinning on 10 out of 11 outbound HTTP endpoints. This discrepancy allows a DNS rebinding TOCTOU attack window, enabling an attacker to manipulate DNS resolution between validation and request execution. The vulnerability has a CVSS 3.1 score of 7.7, indicating high severity. No patches or vendor advisories providing remediation are available at this time.
Potential Impact
Successful exploitation of this SSRF vulnerability could allow an attacker to make the Wallos server send HTTP requests to unintended internal or external resources by exploiting the DNS rebinding TOCTOU window. The CVSS score indicates high impact on confidentiality, with no impact on integrity or availability reported. There are no known exploits in the wild currently.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch is available, users should monitor vendor communications for updates. Until a patch is released, consider restricting outbound HTTP requests from Wallos or implementing network-level controls to limit potential SSRF exploitation.
CVE-2026-41688: CWE-918: Server-Side Request Forgery (SSRF) in ellite Wallos
Description
Wallos is an open-source, self-hostable personal subscription tracker. In versions 4.8.4 and prior, the incomplete SSRF fix in Wallos validates webhook URLs via gethostbyname() but passes the original hostname to cURL without CURLOPT_RESOLVE pinning on 10 of 11 outbound HTTP endpoints, leaving a DNS rebinding TOCTOU window. At time of publication, there are no publicly available patches.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Wallos versions 4.8.4 and prior suffer from an SSRF vulnerability (CWE-918) due to an incomplete fix. While webhook URLs are validated via gethostbyname(), the application passes the original hostname to cURL without using CURLOPT_RESOLVE pinning on 10 out of 11 outbound HTTP endpoints. This discrepancy allows a DNS rebinding TOCTOU attack window, enabling an attacker to manipulate DNS resolution between validation and request execution. The vulnerability has a CVSS 3.1 score of 7.7, indicating high severity. No patches or vendor advisories providing remediation are available at this time.
Potential Impact
Successful exploitation of this SSRF vulnerability could allow an attacker to make the Wallos server send HTTP requests to unintended internal or external resources by exploiting the DNS rebinding TOCTOU window. The CVSS score indicates high impact on confidentiality, with no impact on integrity or availability reported. There are no known exploits in the wild currently.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch is available, users should monitor vendor communications for updates. Until a patch is released, consider restricting outbound HTTP requests from Wallos or implementing network-level controls to limit potential SSRF exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-22T03:53:24.407Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fca382cbff5d8610fd58de
Added to database: 5/7/2026, 2:36:50 PM
Last enriched: 5/7/2026, 2:51:32 PM
Last updated: 5/8/2026, 11:17:27 PM
Views: 13
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