CVE-2026-5795: In Eclipse Jetty, the class JASPIAuthenticator initiates the authentication checks, which set two ThreadLocal

This month

HIGH 7.4REMOTEUPGRADE

CVE-2026-5795 is a high-severity flaw (CVSS 7.4) affecting jetty. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Eclipse Jetty, the class JASPIAuthenticator initiates the authentication checks, which set two ThreadLocal variable. Upon returning from the initial checks, there are conditions that cause an early return from the JASPIAuthenticator code without clearing those ThreadLocals. A subsequent request using the same thread inherits the ThreadLocal values, leading to a broken access control and privilege escalation.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-226, CWE-287
Published	2026-04-08
Last modified	2026-09-14

Publisher (CNA): Eclipse Foundation · Vendor: eclipse

Last updated 2026-09-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 14:16 UTCPublished CVE record published
2026-09-14 13:18 UTCUpdated Record last modified

eclipse jetty UPGRADE

Affected: >= 9.4.0 and <= 9.4.58 · >= 10.0.0 and <= 10.0.26 · >= 11.0.0 and <= 11.0.26 · >= 12.0.0 and < 12.0.34 · >= 12.1.0 and < 12.1.8

Fixed in: 12.0.34, 12.1.8

Safe to downgrade to: a release before 9.4.0

1. Check installed version

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

2. UPGRADE to 12.0.34 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jetty

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 9.4.0 (Debian / Ubuntu)

apt-cache madison jetty sudo apt install jetty=<VERSION_BEFORE_9.4.0> sudo apt-mark hold jetty

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

dnf --showduplicates list jetty sudo dnf downgrade jetty-<VERSION_BEFORE_9.4.0> sudo dnf versionlock add jetty

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-2026-5795?

jetty: upgrade to 12.0.34, 12.1.8. Exact commands for each OS are on this page.

Is CVE-2026-5795 being exploited?

CVE-2026-5795 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-2026-5795 affect?

CVE-2026-5795 affects jetty. Severity is high (CVSS 7.4). In Eclipse Jetty, the class JASPIAuthenticator initiates the authentication checks, which set two ThreadLocal variable. Upon returning from the initial checks, there are conditions that cause an early return from the JASPIAuthenticator co

How urgent is CVE-2026-5795?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

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References

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