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CVE-2026-102128

Accellion Kiteworks: authentication bypass

Risk score
52/100
CVSS
7.5 v3.1
Exploit chance (30 days)
0.2%
Published
30 Sep 2026

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What to know

What it is
An identity-verification weakness in Kiteworks Email Protection Gateway allowed the gateway to act on the Kiteworks platform on behalf of a user it had not authenticated, and to provision a platform account for an identity it did not already know. A remote, unauthenticated sender could potentially exploit this to obta…
Affected
Accellion Kiteworks
Fix
Apply the vendor's security update; see the linked advisory.
Exploitation
No known exploitation

Story map

Story map: Accellion KiteworksTHE FLAWSTHE FIXCVE-2026-102128Authentication bypassCVSS 7.5 · EPSS 0%CVE-2026-102115Kiteworks Core did notcorrectly validate a parametersubmitted to the password…CVSS 9.8 · EPSS 1%CVE-2026-102106Authentication bypassCVSS 9.1 · EPSS 1%CVE-2026-102102Server-side request forgerycan lead to informationdisclosureCVSS 9.1 · EPSS 1%Upgrade Accellion Kiteworks9.5.0or later on your release lineWho is exposedAccellion KiteworksAMBER · PATCH THIS WEEKAccellionKiteworksKiteworks Core did notcorrectly validate a parametersubmitted to the passwordreset workflow. Anunauthenticated attacker whoknew the email address of a userwith a locally stored password…Where it standsNo known exploitationCONNECTS TOSame weaknessAuthentication bypass (CWE-287)237 other warnings in 30 days →Same productEarlier Accellion Kiteworks warnings57 in the last 90 days →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

Accellion Kiteworks: Amber, patch this week. Kiteworks Core did not correctly validate a parameter submitted to the password reset workflow. An unauthenticated attacker who knew the email address of a user with a locally stored password could potentially reset that account's password without access to the emailed reset link and then authenticate as that user, in…

The flaws

  • CVE-2026-102128: Authentication bypass (CVSS 7.5 · EPSS 0%)
  • CVE-2026-102115: Kiteworks Core did not correctly validate a parameter submitted to the password reset workflow (CVSS 9.8 · EPSS 1%)
  • CVE-2026-102106: Authentication bypass (CVSS 9.1 · EPSS 1%)
  • CVE-2026-102102: Server-side request forgery can lead to information disclosure (CVSS 9.1 · EPSS 1%)

The fix

Upgrade Accellion Kiteworks: 9.5.0 or later on your release line

Who is exposed: Accellion Kiteworks

Where it stands

  • No known exploitation

Connects to

Why it is Yellow

  • CVSS 7.5 high
  • Remotely exploitable without logging in

References

Original description

An identity-verification weakness in Kiteworks Email Protection Gateway allowed the gateway to act on the Kiteworks platform on behalf of a user it had not authenticated, and to provision a platform account for an identity it did not already know. A remote, unauthenticated sender could potentially exploit this to obtain control of a platform account.

Last activity 30 Sep 2026. Patch Forecast updates every hour.