CVE-2026-114538: Bootstrap - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-236
CVE-2026-114538 is a vulnerability in Bootstrap - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-236, rated Moderate by Microsoft, with a CVSS 3.1 base score of 6.1 (Medium). An attacker can exploit it remotely over the network, without any privileges and only if a user takes an action. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.16% probability of exploitation activity in the next 30 days, higher than 5% of all scored vulnerabilities. Microsoft released the fix on 31 October 2026, outside Patch Tuesday. It affects 1 product in 1 product family (Open Source Software).
Key facts
- CVE ID
- CVE-2026-114538
- Severity
- Medium CVSS 6.1
- Microsoft severity
- Moderate
- Exploited in the wild
- No
- Publicly disclosed
- No
- Weakness
- CWE-79
- EPSS
- 0.16% (percentile 5%)
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- October 2026 Patch Tuesday
- Product families
- Open Source Software
CVSS score and vector
Microsoft scores CVE-2026-114538 at 6.1 (temporal 6.1) using CVSS 3.1. Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
| Metric | Value |
|---|---|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Changed |
| Confidentiality impact | Low |
| Integrity impact | Low |
| Availability impact | None |
Affected products (1)
Open Source Software
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| azl3 debootstrap 1.0.128+nmu2-1 on Azure Linux 3.0 | Release Notes | Security Update |
NIST NVD data
- NVD status
- Awaiting Analysis
- NVD weakness
- CWE-79
- Published to NVD
- NVD last modified
References
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. |