Every CVE Search/ Get API key

CVE-2019-14855

A flaw was found in the way certificate signatures could be forged using collisions found in the...

5.3 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

1.08%Down 0.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 5.3

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.

Record
CVE-2019-14855
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness
CWE-326
Updated
2026-11-02
EUVDEUVD-2019-5977 5.3

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.

Record
EUVD-2019-5977
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-cpvm-f36g-55vg 7.5

A flaw was found in the way certificate signatures could be forged using collisions found in the...

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.

Record
GHSA-cpvm-f36g-55vg
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-326
Updated
2026-11-02
NVD 7.5

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.

Record
CVE-2019-14855
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness
CWE-326
Updated
2026-11-02
OSVALPINE-CVE-2019-14855 7.5

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.

Record
ALPINE-CVE-2019-14855
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVBELL-CVE-2019-14855 7.5

CVE-2019-14855 does not affect BellSoft software

Record
BELL-CVE-2019-14855
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
Show 6 moreShow less
OSV 7.5

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.

Record
CVE-2019-14855
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2019-14855 7.5

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.

Record
DEBIAN-CVE-2019-14855
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2019-14855 7.5

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.

Record
UBUNTU-CVE-2019-14855
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVMGASA-2019-0348 No score

Updated gnupg2 packages fix security vulnerability

gnupg2 is updated to 2.2.18 and fix security vulnerability:

Web of Trust forgeries using collisions in SHA-1 signatures (CVE-2019-14855)

  • Note that this change removes all SHA-1 based key signature newer than 2019-01-19 from the web-of-trust. This includes all key signature created with dsa1024 keys. The new option --allow-weak-key-signatues can be used to override the new and safer behaviour.

For other fixes in this update, see the gnupg-announce reference.

Record
MGASA-2019-0348
Updated
2026-11-02
OSVopenSUSE-SU-2024:10815-1 No score

dirmngr-2.2.27-2.4 on GA media

These are all security issues fixed in the dirmngr-2.2.27-2.4 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10815-1
Updated
2026-11-02
OSVUSN-4516-1 No score

gnupg2 vulnerability

It was discovered that GnuPG signatures could be forged when the SHA-1 algorithm is being used. This update removes validating signatures based on SHA-1 that were generated after 2019-01-19. In environments where this is still required, a new option --allow-weak-key-signatures can be used to revert this behaviour.

Record
USN-4516-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
gnupg
Alpine:v3.10
 before 2.2.19-r0
2.2.19-r0
gnupg
Alpine:v3.11
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.12
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.13
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.14
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.15
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.16
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.17
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.18
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.19
 before 2.2.18-r0
2.2.18-r0
Show 26 moreShow less
Affected packages
PackageAffectedFixed
gnupg
Alpine:v3.20
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.21
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.22
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.23
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.24
 before 2.2.18-r0
2.2.18-r0
gnupg
Alpine:v3.8
 before 2.2.19-r0
2.2.19-r0
gnupg
Alpine:v3.9
 before 2.2.19-r0
2.2.19-r0
gnupg1
Debian:12
 All versions, plus listed versions
1.4.23-1.11.4.23-21.4.23-3
 None known
gnupg1
Debian:13
 All versions, plus listed versions
1.4.23-3
 None known
gnupg1
Debian:14
 All versions, plus listed versions
1.4.23-3
 None known
gnupg2
Debian:12
 before 2.2.19-1
2.2.19-1
gnupg2
Debian:13
 before 2.2.19-1
2.2.19-1
gnupg2
Debian:14
 before 2.2.19-1
2.2.19-1
gnupg2
Mageia:7
 before 2.2.18-1.mga7
2.2.18-1.mga7
gnupg
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
1.4.14-1ubuntu21.4.15-1.1ubuntu11.4.15-1.1ubuntu21.4.15-2ubuntu11.4.16-1ubuntu1
Show 8 moreShow less
1.4.16-1ubuntu21.4.16-1ubuntu2.11.4.16-1ubuntu2.31.4.16-1ubuntu2.41.4.16-1ubuntu2.51.4.16-1ubuntu2.61.4.16-1ubuntu2.6+esm11.4.16-1ubuntu2.6+esm2
 None known
gnupg
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1.4.18-7ubuntu11.4.19-6ubuntu11.4.20-1ubuntu11.4.20-1ubuntu21.4.20-1ubuntu3
Show 5 moreShow less
1.4.20-1ubuntu3.11.4.20-1ubuntu3.21.4.20-1ubuntu3.31.4.20-1ubuntu3.3+esm21.4.20-1ubuntu3.3+esm3
 None known
gnupg2
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
2.0.28-3ubuntu12.0.28-3ubuntu22.1.11-6ubuntu12.1.11-6ubuntu22.1.11-6ubuntu2.12.1.11-6ubuntu2.1+esm12.1.11-6ubuntu2.1+esm22.1.11-6ubuntu2.1+esm3
 None known
gnupg2
Ubuntu:18.04:LTS
 before 2.2.4-1ubuntu1.3, plus listed versions
2.1.15-1ubuntu82.2.4-1ubuntu12.2.4-1ubuntu1.12.2.4-1ubuntu1.2
2.2.4-1ubuntu1.3
gnupg1
Ubuntu:18.04:LTS
 All versions, plus listed versions
1.4.22-1ubuntu11.4.22-3ubuntu11.4.22-3ubuntu2
 None known
gnupg1
Ubuntu:20.04:LTS
 All versions, plus listed versions
1.4.23-1
 None known
gnupg1
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.4.23-1.1build1
 None known
gnupg1
Ubuntu:24.04:LTS
 All versions, plus listed versions
1.4.23-1.1build21.4.23-1.1build41.4.23-2
 None known
gnupg1
Ubuntu:25.10
 All versions, plus listed versions
1.4.23-3
 None known
gnupg1
Ubuntu:26.10
 All versions, plus listed versions
1.4.23-3build1
 None known
gnupg1
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.4.23-31.4.23-3build1
 None known
gpg2
openSUSE:Tumbleweed
From an advisory covering 8 CVEs
 before 2.2.27-2.4
2.2.27-2.4

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-14855 is a medium vulnerability (CVSS 5.3) in Gnupg, published November 30, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.08%, the 65th percentile. Fixed in gnupg 2.2.19-r0.

References

Show 18 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open