# CVE-2026-107460: Apache Fesod (Incubating): UrlImageConverter SSRF protection bypass via DNS rebinding

> Attacker bypasses SSRF protection in Apache Fesod via DNS rebinding to access restricted internal resources when remote image fetching is enabled.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Oct 2026
- **Updated:** 20 Oct 2026
- **Also known as:** GHSA-vf6f-333q-84g4

## What is CVE-2026-107460?

CVE-2026-107460 is a critical server-side request forgery vulnerability in Apache Fesod (Incubating), published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-107460?


## How do I fix CVE-2026-107460?

No fix has been published for CVE-2026-107460 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-107460 being exploited?

There is no known exploitation of CVE-2026-107460 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-107460 and fix it if it is affected.

What it is: CVE-2026-107460 is a critical server-side request forgery vulnerability in Apache Fesod (Incubating), published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-107460 in the wild and no public exploit code.

Affected product: Apache Fesod (Incubating). No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-107460/ (Markdown: https://insights.sbomify.com/CVE-2026-107460/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-107460
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-107460
- OSV: https://osv.dev/vulnerability/CVE-2026-107460

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-107460/
Summaries are generated and may contain mistakes; the official description above is the record.