CVE-2026-18535 json
IBM API Connect Denial of Service
published 2026-11-07 2 d ago modified 2026-11-08 34 h ago also EUVD-2026-118926
- cvss
- 9.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- ibm.com/support/pages/node/7291753 advisory
- ibm.com/support/pages/node/7292434 advisory
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 34 h ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H |
Affected products
- IBM API Connect
Classification
- Weakness
-
- CWE-1333 Inefficient Regular Expression Complexity
References
-
ibm.com
/support/pages/node/7291753
vendor-advisory, patch
-
ibm.com
/support/pages/node/7292434
vendor-advisory, patch
Sources
- CVE List CVE-2026-18535
- NVD CVE-2026-18535
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.