CVE Catalog

CVE-2026-107460

CriticalCVSS 9.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.18%

7th percentile - higher than 7% of all known CVEs

Summary

Server-Side Request Forgery (SSRF) protection in the UrlImageConverter component of Apache Fesod (Incubating) fesod-sheet 2.0.2-incubating can be bypassed through DNS rebinding. The converter checks the hostname's resolved IP addresses and then opens a separate connection that can resolve the hostname again, allowing an attacker to bypass validation.

Risk Assessment

An attacker controlling DNS responses can force the application server to make requests to restricted addresses, potentially leading to access to internal resources or information disclosure.

Recommendation

Upgrade Apache Fesod (Incubating) to 2.1.0-incubating, which disables remote URL image fetching by default and requires an explicit exact-host allowlist when enabled.

Related vulnerabilities

Original NVD description (English source)

Server-Side Request Forgery (SSRF) protection in the UrlImageConverter component of Apache Fesod (Incubating) fesod-sheet 2.0.2-incubating can be bypassed through DNS rebinding. When an application accepts an attacker-controlled image URL for spreadsheet writing, the converter checks the hostname's resolved IP addresses and then opens a separate connection that can resolve the hostname again. An attacker who controls DNS responses for the URL hostname may cause the connection to reach a restricted address after validation. CVE-2026-49328 covers SSRF in releases before 2.0.2-incubating; this issue is a DNS rebinding bypass of the protection in 2.0.2-incubating. Apache Fesod (Incubating) 2.1.0-incubating addresses the reported default-fetch scenario by disabling remote URL image fetching by default and requiring an explicit exact-host allowlist when the feature is enabled. Users should upgrade to 2.1.0-incubating. Applications enabling remote URL image fetching should allowlist only hostnames whose DNS and HTTP services are trusted.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS