CVE-2026-46581: In Eclipse Mojarra versions 2.3 and following, URL handing in `DefaultFaceletFactory` does not properly saniti

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HIGH 7.5REMOTEUPGRADE

CVE-2026-46581 is a high-severity flaw (CVSS 7.5) affecting mojarra. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Eclipse Mojarra versions 2.3 and following, URL handing in `DefaultFaceletFactory` does not properly sanitize and/or block remote URLs, allowing an attacker to specify a URL to a remote Facelet which will be included and processed as part of the normal request, with the privileges of the target server. This could allow access to restricted files such as `WEB-INF/web.xml` or `/etc/passwd`.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

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	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-22, CWE-94, CWE-641
Published	2026-08-05
Last modified	2026-10-23

Publisher (CNA): Eclipse Foundation · Vendor: eclipse

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-05 12:18 UTCPublished CVE record published
2026-10-23 21:10 UTCUpdated Record last modified

eclipse mojarra UPGRADE

Affected: >= 2.3.0 and <= 4.1.13 · 5.0.0 milestone1 · 5.0.0 milestone2 · 5.0.0 milestone3 · 5.0.0 milestone4 · 5.0.0 milestone5

Fixed in: newer than 4.1.13

Safe to downgrade to: a release before 2.3.0

1. Check installed version

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

2. UPGRADE to newer than 4.1.13 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mojarra

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 2.3.0 (Debian / Ubuntu)

apt-cache madison mojarra sudo apt install mojarra=<VERSION_BEFORE_2.3.0> sudo apt-mark hold mojarra

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

dnf --showduplicates list mojarra sudo dnf downgrade mojarra-<VERSION_BEFORE_2.3.0> sudo dnf versionlock add mojarra

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-fontconfig · FIXED · 0.6.3-1.fc46 · FEDORA-2026-f92ca8b01f · source

sudo dnf upgrade --advisory=FEDORA-2026-f92ca8b01f

Fedora ELN · valgrind · FIXED · 3.28.0-1.eln159 · FEDORA-2026-c593ef1d15 · source

sudo dnf upgrade --advisory=FEDORA-2026-c593ef1d15

Debian 12 · mojarra · NOT AFFECTED

Debian 13 · mojarra · NOT AFFECTED

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-2026-46581?

mojarra: upgrade to newer than 4.1.13. Exact commands for each OS are on this page.

Is CVE-2026-46581 being exploited?

CVE-2026-46581 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-2026-46581 affect?

CVE-2026-46581 affects mojarra. Severity is high (CVSS 7.5). In Eclipse Mojarra versions 2.3 and following, URL handing in `DefaultFaceletFactory` does not properly sanitize and/or block remote URLs, allowing an attacker to specify a URL to a remote Facelet which will be included and processed as par

How urgent is CVE-2026-46581?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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