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CVE-2026-71559: Deserialization of Untrusted Data vulnerability in the Go implementation of Apache Fory allows an attacker to

50
This month
HIGH 7.5REMOTEWATCHLISTUPGRADE

CVE-2026-71559 is a high-severity flaw (CVSS 7.5) affecting fory. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Deserialization of Untrusted Data vulnerability in the Go implementation of Apache Fory allows an attacker to cause a denial of service by supplying crafted data containing malformed type metadata, which triggers an uncaught panic. This issue affects Apache Fory: from 0.16.0 before 1.5.0.  Users of other language implementations are not affected. Users are recommended to upgrade to version 1.5.0, which fixes the issue.

Why this priority

  • High severity
  • Remotely exploitable, no login, no user action
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.8% (top 44%)
CISA exploited listNo
WeaknessCWE-502
Published2026-08-07
Last modified2026-10-24
Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

apache fory UPGRADE
Affected: >= 0.16.0 and < 1.5.0
Fixed in: 1.5.0
Safe to downgrade to: a release before 0.16.0
1. Check installed version
apt-cache policy fory || rpm -q fory || fory --version
2. UPGRADE to 1.5.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade fory
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade fory
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 0.16.0 (Debian / Ubuntu)
apt-cache madison fory sudo apt install fory=<VERSION_BEFORE_0.16.0> sudo apt-mark hold fory
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list fory sudo dnf downgrade fory-<VERSION_BEFORE_0.16.0> sudo dnf versionlock add fory
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · python-streamlink · FIXED · 8.6.2-1.fc46 · FEDORA-2026-a56fcfdc08 · source
sudo dnf upgrade --advisory=FEDORA-2026-a56fcfdc08
Fedora ELN · valgrind · FIXED · 3.28.0-1.eln159 · FEDORA-2026-c593ef1d15 · source
sudo dnf upgrade --advisory=FEDORA-2026-c593ef1d15
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-71559?

fory: upgrade to 1.5.0. Exact commands for each OS are on this page.

Is CVE-2026-71559 being exploited?

CVE-2026-71559 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-71559 affect?

CVE-2026-71559 affects fory. Severity is high (CVSS 7.5). Deserialization of Untrusted Data vulnerability in the Go implementation of Apache Fory allows an attacker to cause a denial of service by supplying crafted data containing malformed type metadata, which triggers an uncaught panic. This is

How urgent is CVE-2026-71559?

Priority 50/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

References

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