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VulnerabilityPublished

CVE-2026-102126: Kiteworks Core · Cross-site Scripting

Affects Kiteworks CoreSource CVE Database V5

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Not known to be exploited · CVSS 8.1 High : upgrade to 9.5.1 soon.

Data as of 14 Nov 2026, 20:43 UTC

CVSS 3.1 base score
8.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 26% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 9.5.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 14 Nov 2026.

What to do

Upgrade Core and kiteworks/core to 9.5.1.

Affected software

ProductAffectedFixed in
KiteworksCoreAffected
  • <9.5.1
Fixed in
  • 9.5.1
GitHubkiteworks/corepkg:github/kiteworks/coreOther threatsAffected
  • <9.5.1
Fixed in
  • 9.5.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, restrict delegated administrator permissions and avoid viewing untrusted content in administrative sessions.

Description

CVE-2026-102126 is a stored cross-site scripting (XSS) vulnerability in Kiteworks Core. It allows a lower-privileged administrator with a narrowly scoped delegated permission to store malicious content. This content executes arbitrary JavaScript in the session of a System Administrator who views the affected page, potentially escalating privileges to full administrative control, including creating new admin accounts. The vulnerability affects Kiteworks Core versions from 0 up to but not including 9.5.1. The CVSS score is 8.1, indicating high severity.

References

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