CVE-2026-22810: Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks

Q: How do I fix CVE-2026-22810?

joplin: upgrade to 3.5.7; one2html: upgrade to newer than 1.3.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-22810 being exploited?

CVE-2026-22810 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-2026-22810 affect?

CVE-2026-22810 affects joplin, one2html. Severity is high (CVSS 8.2). Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Versions prior to 3.5.7 contain a path traversal vulnerability in the importer which allows overwriting arbitrary files on disk. The O

Routine

HIGH 8.2UPGRADEUPGRADE

CVE-2026-22810 is a high-severity flaw (CVSS 8.2) affecting joplin, one2html. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Versions prior to 3.5.7 contain a path traversal vulnerability in the importer which allows overwriting arbitrary files on disk. The OneNote converter does not sanitize the names of embedded files before writing them to disk. As a result, it's possible for an attacker to create a malicious .one file that includes file names containing ../../,

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-24
Published	2026-05-18
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: joplinapp · msiemens

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-18 21:16 UTCPublished CVE record published
2026-07-24 13:10 UTCUpdated Record last modified

joplinapp joplin UPGRADE

Affected: < 3.5.7

Fixed in: 3.5.7

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.5.7 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade joplin

Note

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

msiemens one2html UPGRADE

Affected: <= 1.3.0

Fixed in: newer than 1.3.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy one2html || rpm -q one2html || one2html --version

2. UPGRADE to newer than 1.3.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade one2html

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade one2html

Note

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

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-2026-22810?

joplin: upgrade to 3.5.7; one2html: upgrade to newer than 1.3.0. Exact commands for each OS are on this page.

Is CVE-2026-22810 being exploited?

CVE-2026-22810 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-2026-22810 affect?

CVE-2026-22810 affects joplin, one2html. Severity is high (CVSS 8.2). Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Versions prior to 3.5.7 contain a path traversal vulnerability in the importer which allows overwriting arbitrary files on disk. The O

How urgent is CVE-2026-22810?

Priority 31/100. High severity

References

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