CVE-2026-3107Network attack vector

Browser script execution via unsanitized password imports

Published Mar 31, 2026 · Updated Mar 31, 2026

Stored XSS in Teampass 3.1.5.16 and earlier allows attackers to execute JavaScript in users' browsers through imported passwords. The password import flow stores untrusted field data without sanitizing or output-encoding it, then the items page renders that data as active browser content. Execution occurs when another user views an imported password, exposing that viewer's Teampass session and in-application actions to the payload.

CVSS severity9.3
Critical
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Teampass 3.1.5.16 and earlier allows attackers to execute JavaScript in users' browsers through imported passwords. The password import flow stores untrusted field data without sanitizing or output-encoding it, then the items page renders that data as active browser content. Execution occurs when another user views an imported password, exposing that viewer's Teampass session and in-application actions to the payload.

The record

CVE
CVE-2026-3107
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
Teampass
Product
Teampass
Classifications
CWE-79, T1203
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.1.5.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Teampass · Teampassversion=0 <=3.1.5.16

Published CVSS scores

9.3Spanish National Cybersecurity Institute, S.A. (INCIBE)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
5.4NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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