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.
History

Tue, 20 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 13 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache fesod (incubating)
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

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published: 2026-10-13T14:16:02.556Z

Updated: 2026-10-20T17:39:28.844Z

Reserved: 2026-10-08T05:52:18.687Z

Link: CVE-2026-107460

cve-icon Vulnrichment

Updated: 2026-10-20T17:39:06.352Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-13T15:17:31.657

Modified: 2026-10-20T18:17:16.880

Link: CVE-2026-107460

cve-icon Redhat

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