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CVE-2026-8347

Is CVE-2026-8347 real, exploitable, or a false positive? Here's the community verdict.

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signals

public sources

Exploited in wild
Not listed
CISA KEV
Public exploit
PoC (unverified)
Metasploit/EDB/PoC
Base severity
4.3 Medium
CVSS
Exploitation prob.
0.2%
FIRST EPSS
Weakness
CWE-639
CWE

Moderate signals. Triage by your actual exposure and reachability.

cisa ssvc

CISA Vulnrichment · assessed

Exploitation
None
in the wild
Automatable
No
at scale
Technical impact
Partial
on success

CISA decision, by how critical the affected system is to you:

  • low impact → Track
  • medium impact → Track
  • high impact → Track

Track: normal patch cycle · Track*: watch closely · Attend: patch sooner · Act: patch now. About SSVC ↗

public exploits

links to sources — we don’t host code
GitHub PoCunverified

Unverified proof-of-concept code has been published. It may or may not be functional — assess before relying on it.

affected packages

GHSA-jqvq-gv67-3567 · GitHub rates it low
  • Composerconcrete5/concrete5
    Vulnerable
    < 9.5.1
    Fixed in
    9.5.1

Source: GitHub Advisory Database (CC-BY 4.0), via OSV.dev. Check your lockfile version against the ranges above.

baseline read

auto · not a community verdict

Low signal — verdict needed

Few public signals point to active risk. Whether a scanner hit here is a true or false positive depends on your version and config — community verdicts decide.

Based on CVSS · FIRST EPSS

Confirm or dispute →
Affected:Concretecms

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in the Express association Reorder dialog.  This can cause Cross-entity state tampering with view-only permission on one entry. To be affected, a website has to be using express and relying on express entity ordering. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Winston Crooker for reporting.

References

NVD MITRE CVE.org

Published

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timeline

  1. CISA SSVC assessment · exploitation: none
  2. Published by NVD

Score and exploit changes tracked since .

Community ground truth

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In your experience, is this finding real and exploitable?

awaiting field verdicts
Real, but not a risk here
Not a real issue

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Field notes & remediation

Verdicts are the quick signal. Notes are the evidence and fixes behind them.

  • 0
    Field note · TruePositive EditorialCurated

    No confirmed in-the-wild exploitation or public exploit was found for this yet.

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Related CVEs

Same weakness: CWE-639.