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No exploitation reportedAwaiting NVD analysis

CVE-2026-18535

IBM API Connect Denial of Service

No exploitation reported by the sources we read.

  • Published2026-11-07
  • WeaknessCWE-1333

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

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 are vulnerable to a Regular Expression Denial of Service (ReDoS) attack and to improper neutralisation of wildcard query operators.

Timeline

dates in UTC
  1. 2026-11-0704:56CVE publishedCNA

Versions per branch

Products declared by the CNA

As ibm, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • IBM API Connectother versions: not affected
    Affected
    • ≥ 12.1.0.0, ≤ 12.1.1.2no fix statedsemver
    • ≥ 10.0.8.0, ≤ 10.0.8.12no fix statedsemver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-07

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-18535 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.19.62026-11-07
  • NVDCVSS 3.19.6read 2026-11-07
  • CNAweakness (CWE)CWE-13332026-11-07
  • NVDweakness (CWE)CWE-1333read 2026-11-07
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H
Published
2026-11-07
Last Modified
2026-11-07
NVD status
Awaiting Analysis
GitHub Advisory
GHSA-68pw-29w8-gp2w

Frequently asked questions

What is CVE-2026-18535?

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 are vulnerable to a Regular Expression Denial of Service (ReDoS) attack and to improper neutralisation of wildcard query operators.

Is CVE-2026-18535 actively exploited?

Active exploitation of CVE-2026-18535 has not been confirmed.

What is the CVSS score for CVE-2026-18535?

CVE-2026-18535 has a CVSS v3 base score of 9.6 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H.

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