CVE-2026-46840: Vulnerability in Oracle REST Data Services (component: Backend-as-a-Service)

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CRITICAL 10.0REMOTEUPGRADE

CVE-2026-46840 is a critical-severity flaw (CVSS 10.0) affecting rest data services. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in Oracle REST Data Services (component: Backend-as-a-Service). Supported versions that are affected are 24.2.0-26.1.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Oracle REST Data Services. While the vulnerability is in Oracle REST Data Services, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-284, CWE-287, CWE-306
Published	2026-05-28
Last modified	2026-07-21

Publisher (CNA): Oracle · Vendor: oracle

Last updated 2026-07-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-28 21:16 UTCPublished CVE record published
2026-07-21 10:10 UTCUpdated Record last modified

oracle rest data services UPGRADE

Affected: >= 24.2.0 and <= 26.1.0

Fixed in: newer than 26.1.0

Safe to downgrade to: a release before 24.2.0

1. Check installed version

apt-cache policy rest-data-services || rpm -q rest-data-services || rest-data-services --version

2. UPGRADE to newer than 26.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rest-data-services

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rest-data-services

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 24.2.0 (Debian / Ubuntu)

apt-cache madison rest-data-services sudo apt install rest-data-services=<VERSION_BEFORE_24.2.0> sudo apt-mark hold rest-data-services

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

dnf --showduplicates list rest-data-services sudo dnf downgrade rest-data-services-<VERSION_BEFORE_24.2.0> sudo dnf versionlock add rest-data-services

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-2026-46840?

rest data services: upgrade to newer than 26.1.0. Exact commands for each OS are on this page.

Is CVE-2026-46840 being exploited?

CVE-2026-46840 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-2026-46840 affect?

CVE-2026-46840 affects rest data services. Severity is critical (CVSS 10.0). Vulnerability in Oracle REST Data Services (component: Backend-as-a-Service). Supported versions that are affected are 24.2.0-26.1.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to comprom

How urgent is CVE-2026-46840?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-35266 HIGH 7.9 UPGRADE Vulnerability in Oracle REST Data Services (component: Core)
CVE-2026-35277 HIGH 8.1 UPGRADE Vulnerability in Oracle REST Data Services (component: Core)
CVE-2026-46775 CRITICAL 9.9 UPGRADE Vulnerability in Oracle REST Data Services (component: Core)
CVE-2026-46839 CRITICAL 9.9 UPGRADE Vulnerability in Oracle REST Data Services (component: Core)
CVE-2026-46829 HIGH 7.5 UPGRADE Vulnerability in Oracle REST Data Services (component: Mongoapi)

References

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