CVE-2026-66143: It is possible to bypass the maximum number of normalized policy alternatives that was introduced in Apache Ne

This month

HIGH 7.5REMOTEWATCHLISTDOWNGRADE

CVE-2026-66143 is a high-severity flaw (CVSS 7.5) affecting neethi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

It is possible to bypass the maximum number of normalized policy alternatives that was introduced in Apache Neethi 3.2.2 via certain crafted policies, which may lead to a denial of service attack via resource consumption. Users are recommended to upgrade to version 3.2.3, which fixes this 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 score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 42%)
CISA exploited list	No
Weakness	CWE-400
Published	2026-07-24
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

2026-07-24 13:18 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

apache neethi DOWNGRADE

Affected: 3.2.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.2.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.2.2 (Debian / Ubuntu)

apt-cache madison neethi sudo apt install neethi=<VERSION_BEFORE_3.2.2> sudo apt-mark hold neethi

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list neethi sudo dnf downgrade neethi-<VERSION_BEFORE_3.2.2> sudo dnf versionlock add neethi

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

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · gnome-shell-extension-tiling-assistant · FIXED · 56-1.fc46 · FEDORA-2026-ebf66a5321 · source

sudo dnf upgrade --advisory=FEDORA-2026-ebf66a5321

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-2026-66143?

neethi: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-66143 being exploited?

CVE-2026-66143 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-2026-66143 affect?

CVE-2026-66143 affects neethi. Severity is high (CVSS 7.5). It is possible to bypass the maximum number of normalized policy alternatives that was introduced in Apache Neethi 3.2.2 via certain crafted policies, which may lead to a denial of service attack via resource consumption. Users are recommen

How urgent is CVE-2026-66143?

Priority 51/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2026-66142 HIGH 7.5 UPGRADE Apache Neethi is vulnerable to uncontrolled recursion when parsing policies that lack policy Ids or with deepl
CVE-2026-66144 HIGH 7.5 UPGRADE Although remote policy references are not retrieved during policy normalization, if they are manually retrieve

References

← Back to latest CVEs