CVE-2019-6690

python-gnupg 0.4.3 allows context-dependent attackers to trick gnupg to decrypt other ciphertext than intended. To perform the attack, the passphrase to gnupg must be controlled by the adversary and the ciphertext should be trusted. Related to a "CWE-20: Improper Input Validation" issue affecting the affect functionality component.

Published: 2019-03-21 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-6690 is rated Moderate Risk (58/100): CVSS High severity, with high exploitation likelihood (EPSS 8.55%, 94th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-6690

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 21.43% 8.55% -12.89%
2 2026-02-15 21.70% 21.43% -0.26%
3 2025-12-31 — 21.70% —

Full EPSS history (25 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-6690

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2019-6690

GitHub Security Advisory for CVE-2019-6690

GHSA-2fch-jvg5-crf6 · Severity: high · Ecosystem: pip — Improper Input Validation python-gnupg

OS Trackers for CVE-2019-6690

vendor priority summary link
debian not yet assigned CVE-2019-6690 not yet assigned priority: Debian including 1 source packages (python-gnupg), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-6690
redhat medium — https://access.redhat.com/security/cve/CVE-2019-6690
ubuntu medium CVE-2019-6690 medium priority: Ubuntu including 1 source packages (python-gnupg), 19 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 6, released 6, ignored 5, needed 2. https://ubuntu.com/security/CVE-2019-6690

Affected software / configurations for CVE-2019-6690

Vendor Product Version Raw CPE
python python-gnupg 0.4.3 cpe:2.3:a:python:python-gnupg:0.4.3:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
opensuse leap 15.0 cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
suse backports — cpe:2.3:a:suse:backports:-:*:*:*:*:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.10 cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
canonical ubuntu_linux 19.04 cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*

References for CVE-2019-6690

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00008.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00058.html Mailing List Third Party Advisory
http://packetstormsecurity.com/files/151341/Python-GnuPG-0.4.3-Improper-Input-Validation.html Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/106756 Broken Link
https://blog.hackeriet.no/cve-2019-6690-python-gnupg-vulnerability/ Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00021.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00027.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3WMV6XNPPL3VB3RQRFFOBCJ3AGWC4K47/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W6KYZMN2PWXY4ENZVJUVTGFBVYEVY7II/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X4VFRUG56542LTYK4444TPJBGR57MT25/
https://pypi.org/project/python-gnupg/#history Product Third Party Advisory
https://seclists.org/bugtraq/2019/Jan/41 Mailing List Third Party Advisory
https://usn.ubuntu.com/3964-1/ Third Party Advisory
cvelogic Threat Intelligence