CVE-2024-23655: Tuta is an encrypted email service

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HIGH 7.5REMOTEUPGRADE

CVE-2024-23655 is a high-severity flaw (CVSS 7.5) affecting tutanota. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Tuta is an encrypted email service. Starting in version 3.118.12 and prior to version 3.119.10, an attacker is able to send a manipulated email so that the user can no longer use the app to get access to received emails. By sending a manipulated email, an attacker could put the app into an unusable state. In this case, a user can no longer access received e-mails. Since the vulnerability affects not only the app, but also the web application, a u

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-20
Published	2024-01-25
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: tuta

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

Am I affected?

Timeline

2024-01-25 20:15 UTCPublished CVE record published
2026-06-17 07:13 UTCUpdated Record last modified

tuta tutanota UPGRADE

Affected: >= 3.118.12 and < 3.119.10

Fixed in: 3.119.10

Safe to downgrade to: a release before 3.118.12

1. Check installed version

apt-cache policy tutanota || rpm -q tutanota || tutanota --version

2. UPGRADE to 3.119.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tutanota

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tutanota

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.118.12 (Debian / Ubuntu)

apt-cache madison tutanota sudo apt install tutanota=<VERSION_BEFORE_3.118.12> sudo apt-mark hold tutanota

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tutanota sudo dnf downgrade tutanota-<VERSION_BEFORE_3.118.12> sudo dnf versionlock add tutanota

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2024-23655?

tutanota: upgrade to 3.119.10. Exact commands for each OS are on this page.

Is CVE-2024-23655 being exploited?

CVE-2024-23655 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-2024-23655 affect?

CVE-2024-23655 affects tutanota. Severity is high (CVSS 7.5). Tuta is an encrypted email service. Starting in version 3.118.12 and prior to version 3.119.10, an attacker is able to send a manipulated email so that the user can no longer use the app to get access to received emails. By sending a manipu

How urgent is CVE-2024-23655?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-23330 MEDIUM 5.3 UPGRADE Tuta is an encrypted email service
CVE-2023-46116 CRITICAL 9.3 UPGRADE Tutanota (Tuta Mail) is an encrypted email provider

References

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