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Vulnerability record · CVE-2019-14855 · published 20 March 2020

CVE-2019-14855: Gnupg inadequate encryption strength vulnerability

Gnupg · Gnupg

A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18.

7.5 CVSS 3.1 High EPSS 1.1% · top 36.4% CWE-326 · Inadequate encryption strength
7.5CVSS 3.1 base score, v2 5.0
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
10References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14855 Issue TrackingThird Party Advisory
https://dev.gnupg.org/T4755 Vendor Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2019q4/000442.html Mailing ListRelease NotesVendor Advisory
https://rwc.iacr.org/2020/slides/Leurent.pdf ExploitThird Party Advisory
https://usn.ubuntu.com/4516-1/ Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14855 Issue TrackingThird Party Advisory
https://dev.gnupg.org/T4755 Vendor Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2019q4/000442.html Mailing ListRelease NotesVendor Advisory
https://rwc.iacr.org/2020/slides/Leurent.pdf ExploitThird Party Advisory
https://usn.ubuntu.com/4516-1/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-14855), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.