CVE-2023-26314: The mono package before 6.8.0.105+dfsg-3.3 for Debian allows arbitrary code execution because the application/

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HIGH 8.8WATCHLISTMITIGATEMITIGATE

CVE-2023-26314 is a high-severity flaw (CVSS 8.8) affecting mono, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The mono package before 6.8.0.105+dfsg-3.3 for Debian allows arbitrary code execution because the application/x-ms-dos-executable MIME type is associated with an un-sandboxed Mono CLR interpreter.

Why this priority

High severity
On your watchlist

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Published	2023-02-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · mono-project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-02-22 07:15 UTCPublished CVE record published
2026-06-17 05:43 UTCUpdated Record last modified

mono-project mono MITIGATE

Affected: 5.18.0.240\+dfsg-3 · 6.8.0.105\+dfsg-3

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

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

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

debian debian linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2023-26314?

mono: mitigate or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-26314 being exploited?

CVE-2023-26314 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-2023-26314 affect?

CVE-2023-26314 affects mono, debian linux. Severity is high (CVSS 8.8). The mono package before 6.8.0.105+dfsg-3.3 for Debian allows arbitrary code execution because the application/x-ms-dos-executable MIME type is associated with an un-sandboxed Mono CLR interpreter.

How urgent is CVE-2023-26314?

Priority 51/100. High severity; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2023-35373 MEDIUM 5.3 UPGRADE Mono Authenticode Validation Spoofing Vulnerability

References

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