CVE-2026-78602: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE-22) in Elastic Maps Server

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-78602 is a medium-severity flaw (CVSS 5.3) affecting maps server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE-22) in Elastic Maps Server can lead to information disclosure via Path Traversal (CAPEC-126). An unauthenticated attacker able to reach the service over the network could cause it to return the contents of files outside its intended content directory that are readable by the server process.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
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
Published	2026-09-02
Last modified	2026-09-08

Publisher (CNA): Elastic · Vendor: elastic

Last updated 2026-09-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-02 15:17 UTCPublished CVE record published
2026-09-08 18:29 UTCUpdated Record last modified

elastic maps server UPGRADE

Affected: >= 8.19.11 and < 8.19.19 · >= 9.3.0 and < 9.4.4 · 9.5.0

Fixed in: 8.19.19, 9.4.4

Safe to downgrade to: a release before 8.19.11

1. Check installed version

apt-cache policy maps-server || rpm -q maps-server || maps-server --version

2. UPGRADE to 8.19.19 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade maps-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade maps-server

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 8.19.11 (Debian / Ubuntu)

apt-cache madison maps-server sudo apt install maps-server=<VERSION_BEFORE_8.19.11> sudo apt-mark hold maps-server

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

dnf --showduplicates list maps-server sudo dnf downgrade maps-server-<VERSION_BEFORE_8.19.11> sudo dnf versionlock add maps-server

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-2026-78602?

maps server: upgrade to 8.19.19, 9.4.4. Exact commands for each OS are on this page.

Is CVE-2026-78602 being exploited?

CVE-2026-78602 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-2026-78602 affect?

CVE-2026-78602 affects maps server. Severity is medium (CVSS 5.3). Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE-22) in Elastic Maps Server can lead to information disclosure via Path Traversal (CAPEC-126). An unauthenticated attacker able to reach the service over the

How urgent is CVE-2026-78602?

Priority 35/100. Remotely exploitable, no login, no user action

References

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