CVE-2019-8338: The signature verification routine in the Airmail GPG-PGP Plugin, versions 1.0 (9) and earlier, does not verif

Q: How do I fix CVE-2019-8338?

gpg-pgp: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2019-8338 being exploited?

CVE-2019-8338 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-8338 affect?

CVE-2019-8338 affects gpg-pgp. Severity is medium (CVSS 5.9). The signature verification routine in the Airmail GPG-PGP Plugin, versions 1.0 (9) and earlier, does not verify the status of the signature at all, which allows remote attackers to spoof arbitrary email signatures by crafting a signed email

Q: How urgent is CVE-2019-8338?

Priority 45/100. Remotely exploitable, no login, no user action

This month

MEDIUM 5.9REMOTEMITIGATE

CVE-2019-8338 is a medium-severity flaw (CVSS 5.9) affecting gpg-pgp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The signature verification routine in the Airmail GPG-PGP Plugin, versions 1.0 (9) and earlier, does not verify the status of the signature at all, which allows remote attackers to spoof arbitrary email signatures by crafting a signed email with an invalid signature. Also, it does not verify the validity of the signing key, which allows remote attackers to spoof arbitrary email signatures by crafting a key with a fake user ID (email address) and

Why this priority

Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 22%)
CISA exploited list	No
Weakness	CWE-347
Published	2019-05-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gpg-pgp project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-05-16 17:29 UTCPublished CVE record published
2026-06-17 02:41 UTCUpdated Record last modified

gpg-pgp project gpg-pgp MITIGATE

Affected: <= 1.0\(9\)

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy gpg-pgp || rpm -q gpg-pgp || gpg-pgp --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-8338?

gpg-pgp: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-8338 being exploited?

CVE-2019-8338 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-8338 affect?

CVE-2019-8338 affects gpg-pgp. Severity is medium (CVSS 5.9). The signature verification routine in the Airmail GPG-PGP Plugin, versions 1.0 (9) and earlier, does not verify the status of the signature at all, which allows remote attackers to spoof arbitrary email signatures by crafting a signed email

How urgent is CVE-2019-8338?

Priority 45/100. Remotely exploitable, no login, no user action

References

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