How severe is CVE-2019-9148?

CVE-2019-9148 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2019-9148 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-9148?

CVE-2019-9148 affects Mailvelope. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-9148?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-9148 published?

CVE-2019-9148 was published on 2019-07-09 and last updated on 2026-06-17.

CVE-2019-9148

CVE-2019-9148 is a medium-severity vulnerability in Mailvelope with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Mailvelope
Published: 2019-07-09
Last modified: 2026-06-17

Description

Mailvelope prior to 3.3.0 accepts or operates with invalid PGP public keys: Mailvelope allows importing keys that contain users without a valid self-certification. Keys that are obviously invalid are not rejected during import. An attacker that is able to get a victim to import a manipulated key could claim to have signed a message that originates from another person.

Frequently asked questions

What is CVE-2019-9148?: Mailvelope prior to 3.3.0 accepts or operates with invalid PGP public keys: Mailvelope allows importing keys that contain users without a valid self-certification. Keys that are obviously invalid are not rejected during import. An attacker that is able to get a victim to import a manipulated key could claim to have signed a message that originates from another person.
How severe is CVE-2019-9148?: CVE-2019-9148 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2019-9148 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-9148?: CVE-2019-9148 affects Mailvelope. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-9148?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-9148 published?: CVE-2019-9148 was published on 2019-07-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mailvelope:mailvelope:*:*:*:*:*:*:*:*

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