CVE-2026-35253: Vulnerability in the Oracle Macoron Tool product of Oracle Open Source Projects

Routine

MEDIUM 4.7DOWNGRADE

CVE-2026-35253 is a medium-severity flaw (CVSS 4.7) affecting macaron. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in the Oracle Macoron Tool product of Oracle Open Source Projects. The supported versions that is affected is v0.22.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Macaron Tool. Successful attacks of this vulnerability can result in Oracle Macaron Tool failing host address validation.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-601, CWE-346
Published	2026-05-06
Last modified	2026-10-26

Publisher (CNA): Oracle · Vendor: oracle

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-06 08:16 UTCPublished CVE record published
2026-10-26 19:10 UTCUpdated Record last modified

oracle macaron DOWNGRADE

Affected: 0.22.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.22.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.22.0 (Debian / Ubuntu)

apt-cache madison macaron sudo apt install macaron=<VERSION_BEFORE_0.22.0> sudo apt-mark hold macaron

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

dnf --showduplicates list macaron sudo dnf downgrade macaron-<VERSION_BEFORE_0.22.0> sudo dnf versionlock add macaron

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-2026-35253?

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

Is CVE-2026-35253 being exploited?

CVE-2026-35253 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-2026-35253 affect?

CVE-2026-35253 affects macaron. Severity is medium (CVSS 4.7). Vulnerability in the Oracle Macoron Tool product of Oracle Open Source Projects. The supported versions that is affected is v0.22.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise

How urgent is CVE-2026-35253?

Priority 17/100. No elevated risk signals yet.

References

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