---
title: "CVE-2026-50076: Apache Fory Java SDK Has Deserialization of Untrusted Data in the Java replace-resolve path"
url: https://erroneo.us/security/cve/CVE-2026-50076/
description: "CVE-2026-50076 (org.apache.fory:fory-core (Maven)): Deserialization of Untrusted Data in the Java replace-resolve path in Apache Fory fory-core Java SDK…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-04
date_modified: 2026-07-15
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-50076"
kev: false
cvss: 9.1
epss: 0.00742
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-50076: Apache Fory Java SDK Has Deserialization of Untrusted Data in the Java replace-resolve path

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.7% , percentile 54: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 54% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes org.apache.fory:fory-core (Maven) < 1.1.0, fixed in 1.1.0 . Check your lockfile, including transitive dependencies.

## What it is

Deserialization of Untrusted Data in the Java replace-resolve path in Apache Fory fory-core Java SDK before 1.1.0 on Java/JVM platforms allows a remote attacker to bypass class registration, TypeChecker, and DisallowedList checks and invoke classpath-present readResolve/readExternal hooks via crafted Fory serialized data. Users are recommended to upgrade to version 1.1.0 or later, which fixes this issue.

## Affected packages

- Maven `org.apache.fory:fory-core` < 1.1.0 → fixed: 1.1.0

## Affected products (CVE record)

- Apache Software Foundation Apache Fory: < 1.1.0

## Severity

- CISA-ADP CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.74% probability of exploitation activity in the next 30 days; percentile 54.

## Sources

- [fory.apache.org](https://fory.apache.org/security)
- [GitHub Advisory GHSA-8f39-v287-78jf](https://github.com/advisories/GHSA-8f39-v287-78jf)
- [CVE.org record CVE-2026-50076](https://www.cve.org/CVERecord?id=CVE-2026-50076)
- [NVD entry CVE-2026-50076](https://nvd.nist.gov/vuln/detail/CVE-2026-50076)
- [openwall.com](http://www.openwall.com/lists/oss-security/2026/06/04/4)

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Source page: https://erroneo.us/security/cve/CVE-2026-50076/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt