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ExploitedIn CISA KEVFix available

CVE-2023-26359

Exploitation confirmed. First attested on 2023-08-21 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2023-03-23
  • WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Adobe ColdFusion versions 2018 Update 15 (and earlier) and 2021 Update 5 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user interaction.

Timeline

dates in UTC
  1. 2023-03-2320:15CVE publishedNVD
  2. 2023-08-21Added to the CISA KEV catalogCISA KEV
  3. 2023-08-21Listed as exploited by GCVEGCVE
  4. 2023-08-21Exploitation first reportedCISA KEV
  5. 2025-02-0416:11SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-26359?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-26359?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Adobe coldfusion
BranchAffectedFixed in
2018.x= 2018no fix published
2021.x= 2021no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As adobe, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Adobe ColdFusion
    Affected
    • ≤ CF2018U15, CF2021U5no fix statedcustom
    • ≤ Noneno fix statedcustom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-03-23

Fix

  1. CISA’s required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.due 2023-09-11

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2023-08-21
Patch Due Date
2023-09-11
Ransomware Use
Unknown
Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2023-03-23
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-p4mq-mqpj-7xcj

Frequently asked questions

What is CVE-2023-26359?

Adobe ColdFusion versions 2018 Update 15 (and earlier) and 2021 Update 5 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user interaction.

Is CVE-2023-26359 actively exploited?

Yes. CVE-2023-26359 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2023-09-11.

What is the CVSS score for CVE-2023-26359?

CVE-2023-26359 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record