What is CVE-2016-1000030?

CVE-2016-1000030 is a critical-severity vulnerability in Pidgin, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2018-09-05.

How severe is CVE-2016-1000030?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Pidgin

CVE-2016-1000030

Pidgin version <2.11.0 contains a vulnerability in X.509 Certificates imports specifically due to improper check of return values from gnutls_x509_crt_init() and gnutls_x509_crt_import() that can result in code execution. This attack appear to be exploitable via custom X.509 certificate from another client. This vulnerability appears to have been fixed in 2.11.0.

Vulnerability class: Improper Certificate Validation

Published 2018-09-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.018 (78.7th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Pidgin
SUSE Linux Enterprise Server — versions 11

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

www.suse.com/pt-br/security/cve/CVE-2016-1000030/ (Third Party Advisory)
pidgin.im/news/security/ (Vendor Advisory)
bitbucket.org/pidgin/main/commits/d6fc1ce76ffe (Patch, Third Party Advisory)
access.redhat.com/security/cve/cve-2016-1000030 (Third Party Advisory)
security.gentoo.org/glsa/201701-38 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2016-1000030?: CVE-2016-1000030 is a critical-severity vulnerability in Pidgin, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2018-09-05.
How severe is CVE-2016-1000030?: Critical severity. CVSS v3 base score is 9.8 out of 10.