01 Record
CVE-2026-107889
Keycloak-services: keycloak-services: stored xss on login page via kcsanitize bypass
MediumPUBLISHEDCNA: redhat
CNA base score5.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
02 Description
Keycloak-services: keycloak-services: stored xss on login page via kcsanitize bypass
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.26% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 18.8% of scored records. A rank, not a probability.
- NVD base score
- 5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-10-13.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-10-09 04:28Z20 DAYS AGO
- Last updated
- 2026-10-13 16:46Z15 DAYS AGO
- Reserved
- 2026-10-09
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
- Data version
- 5.2
- Document digest
- ad07c4089528ed7a5d61e3cc18a5c09cc7efeed2ec2a46d2b6b15093157c79dd
05 Affected products
VendorProductVersionsPlatforms
06 References
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-107889
- bugzilla.redhat.comRHBZ#2548355https://bugzilla.redhat.com/show_bug.cgi?id=2548355