CVE-2026-28507: Idno is a social publishing platform

Q: How do I fix CVE-2026-28507?

known: upgrade to 1.6.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-28507 being exploited?

CVE-2026-28507 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-28507 affect?

CVE-2026-28507 affects known. Severity is high (CVSS 7.2). Idno is a social publishing platform. Prior to version 1.6.4, there is a remote code execution vulnerability via chained import file write and template path traversal. This issue has been patched in version 1.6.4.

Q: How urgent is CVE-2026-28507?

Priority 43/100. High severity; Public exploit reference

This month

HIGH 7.2UPGRADE

CVE-2026-28507 is a high-severity flaw (CVSS 7.2) affecting known. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Idno is a social publishing platform. Prior to version 1.6.4, there is a remote code execution vulnerability via chained import file write and template path traversal. This issue has been patched in version 1.6.4.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-03-06
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: withknown

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

Am I affected?

Timeline

2026-03-06 05:16 UTCPublished CVE record published
2026-06-17 10:28 UTCUpdated Record last modified

withknown known UPGRADE

Affected: < 1.6.4

Fixed in: 1.6.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.6.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade known

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade known

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-28507?

known: upgrade to 1.6.4. Exact commands for each OS are on this page.

Is CVE-2026-28507 being exploited?

CVE-2026-28507 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-2026-28507 affect?

CVE-2026-28507 affects known. Severity is high (CVSS 7.2). Idno is a social publishing platform. Prior to version 1.6.4, there is a remote code execution vulnerability via chained import file write and template path traversal. This issue has been patched in version 1.6.4.

How urgent is CVE-2026-28507?

Priority 43/100. High severity; Public exploit reference

Related CVEs

CVE-2026-28508 HIGH 8.6 UPGRADE Idno is a social publishing platform
CVE-2026-26273 CRITICAL 9.8 UPGRADE Known is a social publishing platform

References

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