Security incident · CVE-2026-1440
Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused by a lack of proper sanitization and escaping in HTML output.
Published Feb 18, 2026 · catalog updated Feb 18, 2026 · Graylog Graylog Web Interface
Last checked Nov 14, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-1440. EPSS is 0.23%. Act only if a listed version of Graylog Graylog Web Interface is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-1441 · Medium
- CVE-2026-1439 · Medium
- CVE-2026-1438 · Medium
- CVE-2026-1437 · Medium
- CVE-2026-1436 · High
- Severity
- Medium5.3
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.23%
- Remediation
- Vendor / distro source
- Affected products
- vendor Graylog Graylog Web Interface 2.2.3
Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused by a lack of proper sanitization and escaping in HTML output. Several endpoints include segments of the URL directly in the response without applying output encoding, allowing an attacker to inject and execute arbitrary JavaScript code when a user visits a specially crafted URL. Exploitation of this vulnerability may allow script execution in the victim's browser and limited manipulation of the affected user's session context, through the '/system/pipelines/' endpoint.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Graylog Graylog Web Interface 2.2.32.2.3
How to fix CVE-2026-1440
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
Seen in 2.2.3
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-1440. EPSS is 0.23%. Act only if a listed version of Graylog Graylog Web Interface is installed.
Which versions are affected?
Compare what you have installed with Graylog Graylog Web Interface 2.2.3 2.2.3. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.23%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Feb 18, 2026 · EUVD
Detected
Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused by a lack of proper sanitization and escaping in HTML output. Several endpoints include segments of the URL directly in the response without applying output encoding, allowing an attacker to inject and execute arbitrary JavaScript code when a user visits a specially crafted URL. Exploitat
Feb 18, 2026 · EUVD
Updated
Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused by a lack of proper sanitization and escaping in HTML output. Several endpoints include segments of the URL directly in the response without applying output encoding, allowing an attacker to inject and execute arbitrary JavaScript code when a user visits a specially crafted URL. Exploitat
Sources
- CVE.orgVulnerability recordCVE-2026-1440
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-1440
30-day exploitation probability 0.23%
first.org - EUVDVulnerability recordEUVD-2026-8068
Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused by a lack of proper sanitization and escaping in HTML output. Several endpoints include segments of the URL directly in the response without applying output encoding, al
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Nov 14, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSNov 14, 2026
- CVE.orgNov 9, 2026
- EUVDNov 9, 2026