CVE-2026-107460
—UnscoredPublished 13 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
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- Complexity
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- Privileges needed
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- User interaction
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- Impact
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- Weakness
- CWE-918
Impact
Attackers can bypass SSRF filters and force the server to connect to internal or restricted network addresses. They need the application to process an attacker-supplied image URL pointing to a domain under their DNS control.
Root cause
The UrlImageConverter component validates the resolved IP address of a hostname and then initiates a separate connection that resolves DNS a second time, enabling a DNS rebinding attack.
Affected systems
Apache Fesod (Incubating) fesod-sheet 2.0.2-incubating
Fix & remediation
Upgrade fesod-sheet to 2.1.0-incubating, which disables remote URL image fetching by default; if enabling fetching, explicitly configure the host allowlist with only trusted hosts.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
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.