CVE-2026-2333: Improper Neutralization of Special Elements used in a Command ('Command Injection') in Owl opds 2.2.0.4 allows

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CRITICAL 9.8REMOTEMITIGATE

CVE-2026-2333 is a critical-severity flaw (CVSS 9.8) affecting opds-talon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Neutralization of Special Elements used in a Command ('Command Injection') in Owl opds 2.2.0.4 allows Command Injection via a crafted network request.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-77
Published	2026-02-20
Last modified	2026-06-17

Publisher (CNA): Nozomi Networks Inc. · Vendor: owlcyberdefense

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

Am I affected?

Timeline

2026-02-20 17:25 UTCPublished CVE record published
2026-06-17 10:30 UTCUpdated Record last modified

owlcyberdefense opds-talon MITIGATE

Affected: 2.2.0.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2.0.4

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora ELN · fwupd-efi · FIXED · 1.9-3.eln159 · FEDORA-2026-44fd42db42 · source

sudo dnf upgrade --advisory=FEDORA-2026-44fd42db42

Fedora 46 · crest · FIXED · 3.0.2-1.fc46 · FEDORA-2026-b49adefa8f · source

sudo dnf upgrade --advisory=FEDORA-2026-b49adefa8f

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-2026-2333?

opds-talon: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-2333 being exploited?

CVE-2026-2333 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-2026-2333 affect?

CVE-2026-2333 affects opds-talon. Severity is critical (CVSS 9.8). Improper Neutralization of Special Elements used in a Command ('Command Injection') in Owl opds 2.2.0.4 allows Command Injection via a crafted network request.

How urgent is CVE-2026-2333?

Priority 56/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-26102 HIGH 7.8 MITIGATE Incorrect Permission Assignment for Critical Resource in Owl opds 2.2.0.4 allows File Manipulation via a craft
CVE-2026-26101 HIGH 7.8 MITIGATE Incorrect Permission Assignment for Critical Resource in Owl opds 2.2.0.4 allows File Manipulation via a craft
CVE-2026-26100 MEDIUM 5.5 MITIGATE Incorrect Permission Assignment for Critical Resource in Owl opds 2.2.0.4 allows File Manipulation via a craft
CVE-2026-26099 MEDIUM 5.5 MITIGATE Uncontrolled Search Path Element in Owl opds 2.2.0.4 allows Leveraging/Manipulating Configuration File Search
CVE-2026-26098 MEDIUM 5.5 MITIGATE Uncontrolled Search Path Element in Owl opds 2.2.0.4 allows Leveraging/Manipulating Configuration File Search

References

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