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Description

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.

PUBLISHED Reserved 2026-03-21 | Published 2026-03-21 | Updated 2026-03-24 | Assigner VulnCheck




MEDIUM: 6.9CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
MEDIUM: 6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Reliance on Untrusted Inputs in a Security Decision

Product status

2.13.0
affected

Credits

Alejandra Sánchez finder

References

www.exploit-db.com/exploits/46930 (ExploitDB-46930) exploit

pidgin.im/ (Official Product Homepage) product

www.vulncheck.com/...enial-of-service-via-malformed-username (VulnCheck Advisory: Pidgin 2.13.0 Denial of Service via Malformed Username) third-party-advisory

cve.org (CVE-2019-25544)

nvd.nist.gov (CVE-2019-25544)

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