CVE-2026-121627

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

Not scored by EPSS

EPSS percentile

Not scored by EPSS

NVD base score

The NVD has published no score for this record

NVD CVSS vector

No NVD score to derive

NVD analysis status

Not recorded

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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.

Published

2026-11-03 17:13Z1 HR AGO

Last updated

2026-11-03 17:13Z1 HR AGO

Reserved

2026-11-03

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page GenerationBase

Data version

5.2

Document digest

c315bd0264d16981739c0e32b8910abebafb81c5f5adddb5f625fa8180694d7c

• github.comGitHub Issue #911https://github.com/jarun/buku/issues/911issue-tracking
• github.comhttps://github.com/jarun/buku/blob/v5.1.1/bukuserver/views.py#L133technical-description
• github.comhttps://github.com/jarun/bukuproduct
• www.vulncheck.comVulnCheck Advisory: buku 5.0 through 5.1.1 Stored XSS via bukuserver Bookmark List URLhttps://www.vulncheck.com/advisories/buku-5.0-through-5.1.1-stored-xss-via-bukuserver-bookmark-list-urlthird-party-advisory