CVE-2019-25544: Pidgin 2.13.0 Denial of Service via Malformed Username

Published Mar 21, 2026
·
Updated

Pidgin 2.13.0 contains a denial of service vulnerability that allows local attackers to crash the application by providing an excessively long username string during account creation. Attackers can input a buffer of 1000 characters in the username field and trigger a crash when joining a chat, causing the application to become unavailable.

Affected Software

2 affected components
Pidgin Pidgin=2.13.0
Pidgin Pidgin=2.13.0

Event History

Mar 21, 2026
CVE Published
via MITRE·12:46 PM
Data Sourced
via MITRE·12:46 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·01:16 PM
DescriptionSeverityWeaknessAffected Software
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2019-25544?

CVE-2019-25544 has been classified as a denial of service vulnerability.

2

How do I fix CVE-2019-25544?

To fix CVE-2019-25544, users should avoid using the vulnerable Pidgin version 2.13.0 and upgrade to a patched version.

3

Who is affected by CVE-2019-25544?

CVE-2019-25544 affects users of Pidgin version 2.13.0 who attempt to create accounts with excessively long usernames.

4

Can CVE-2019-25544 be exploited remotely?

CVE-2019-25544 requires local access to exploit, as the vulnerability is triggered during account creation.

5

What versions of Pidgin are vulnerable to CVE-2019-25544?

Only Pidgin version 2.13.0 is identified as vulnerable to CVE-2019-25544.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203