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.
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Affected Vendors & Products
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History
Tue, 13 Oct 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Apache
Apache fesod (incubating) |
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| Vendors & Products |
Apache
Apache fesod (incubating) |
Tue, 13 Oct 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Apache Fesod (Incubating): UrlImageConverter SSRF protection bypass via DNS rebinding | |
| Weaknesses | CWE-918 | |
| References |
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Status: PUBLISHED
Assigner: apache
Published:
Updated: 2026-10-13T14:16:02.556Z
Reserved: 2026-10-08T05:52:18.687Z
Link: CVE-2026-107460
No data.
Status : Received
Published: 2026-10-13T15:17:31.657
Modified: 2026-10-13T15:17:31.657
Link: CVE-2026-107460
No data.
OpenCVE Enrichment
Updated: 2026-10-13T18:15:16Z
Weaknesses