CVE-2023-26845: A Cross-Site Request Forgery (CSRF) in OpenCATS 0.9.7 allows attackers to force users into submitting web requ

Routine

MEDIUM 4.3DOWNGRADE

CVE-2023-26845 is a medium-severity flaw (CVSS 4.3) affecting opencats. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Cross-Site Request Forgery (CSRF) in OpenCATS 0.9.7 allows attackers to force users into submitting web requests via unspecified vectors.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-352
Published	2023-04-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: opencats

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

Am I affected?

Timeline

2023-04-11 15:15 UTCPublished CVE record published
2026-06-17 05:43 UTCUpdated Record last modified

opencats opencats DOWNGRADE

Affected: 0.9.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.9.7 (Debian / Ubuntu)

apt-cache madison opencats sudo apt install opencats=<VERSION_BEFORE_0.9.7> sudo apt-mark hold opencats

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

dnf --showduplicates list opencats sudo dnf downgrade opencats-<VERSION_BEFORE_0.9.7> sudo dnf versionlock add opencats

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-2023-26845?

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

Is CVE-2023-26845 being exploited?

CVE-2023-26845 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-2023-26845 affect?

CVE-2023-26845 affects opencats. Severity is medium (CVSS 4.3). A Cross-Site Request Forgery (CSRF) in OpenCATS 0.9.7 allows attackers to force users into submitting web requests via unspecified vectors.

How urgent is CVE-2023-26845?

Priority 19/100. No elevated risk signals yet.

Related CVEs

CVE-2023-27295 MEDIUM 5.4 DOWNGRADE Cross-site request forgery is facilitated by OpenCATS failure to require CSRF tokens in POST requests
CVE-2023-27294 MEDIUM 5.4 DOWNGRADE Improper neutralization of input during web page generation allows an authenticated attacker with access to a
CVE-2023-27293 MEDIUM 6.1 DOWNGRADE Improper neutralization of input during web page generation allows an unauthenticated attacker to submit malic
CVE-2023-27292 MEDIUM 5.4 DOWNGRADE An open redirect vulnerability exposes OpenCATS to template injection due to improper validation of user-suppl
CVE-2023-26847 MEDIUM 5.4 DOWNGRADE A stored cross-site scripting (XSS) vulnerability in OpenCATS v0.9.7 allows attackers to execute arbitrary web

References

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