CVE-2026-62418: Low-privileged authenticated Server-Side Request Forgery (SSRF) vulnerability in Apache Syncope via Connector

This month

HIGH 8.1WATCHLISTUPGRADE

CVE-2026-62418 is a high-severity flaw (CVSS 8.1) affecting syncope. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Low-privileged authenticated Server-Side Request Forgery (SSRF) vulnerability in Apache Syncope via Connectors and Resources check. This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1. Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-07-20
Last modified	2026-10-24

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

2026-07-20 15:16 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

apache syncope UPGRADE

Affected: >= 3.0.0 and <= 3.0.16 · >= 4.0.0 and < 4.0.7 · >= 4.1.0 and < 4.1.2

Fixed in: 4.0.7, 4.1.2

Safe to downgrade to: a release before 3.0.0

1. Check installed version

apt-cache policy syncope || rpm -q syncope || syncope --version

2. UPGRADE to 4.0.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade syncope

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade syncope

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 3.0.0 (Debian / Ubuntu)

apt-cache madison syncope sudo apt install syncope=<VERSION_BEFORE_3.0.0> sudo apt-mark hold syncope

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list syncope sudo dnf downgrade syncope-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add syncope

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.

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-2026-62418?

syncope: upgrade to 4.0.7, 4.1.2. Exact commands for each OS are on this page.

Is CVE-2026-62418 being exploited?

CVE-2026-62418 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-2026-62418 affect?

CVE-2026-62418 affects syncope. Severity is high (CVSS 8.1). Low-privileged authenticated Server-Side Request Forgery (SSRF) vulnerability in Apache Syncope via Connectors and Resources check. This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0

How urgent is CVE-2026-62418?

Priority 43/100. High severity; On your watchlist

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References

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