CVE-2026-81730: Dolibarr 9.0.0 through 23.0.4 saves inbound email attachments under the name supplied in the message's MIME he

This month

HIGH 8.2REMOTEUPGRADE

CVE-2026-81730 is a high-severity flaw (CVSS 8.2) affecting dolibarr erp\/crm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dolibarr 9.0.0 through 23.0.4 saves inbound email attachments under the name supplied in the message's MIME headers without reducing it to a safe basename. The global saveAttachment() in htdocs/emailcollector/lib/emailcollector.lib.php builds $filepath = $path . $filename . '.' . $ext and hands it to file_put_contents(), and the private saveAttachment() in htdocs/emailcollector/class/emailcollector.class.php writes to $destdir.'/'.$filename; the

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-08-27
Last modified	2026-08-31

Publisher (CNA): VulnCheck · Vendor: dolibarr

Last updated 2026-08-31 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-27 20:18 UTCPublished CVE record published
2026-08-31 18:08 UTCUpdated Record last modified

dolibarr dolibarr erp\/crm UPGRADE

Affected: >= 9.0.0 and < 24.0.0

Fixed in: 24.0.0

Safe to downgrade to: a release before 9.0.0

1. Check installed version

apt-cache policy dolibarr-erpcrm || rpm -q dolibarr-erpcrm || dolibarr-erpcrm --version

2. UPGRADE to 24.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dolibarr-erpcrm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dolibarr-erpcrm

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 9.0.0 (Debian / Ubuntu)

apt-cache madison dolibarr-erpcrm sudo apt install dolibarr-erpcrm=<VERSION_BEFORE_9.0.0> sudo apt-mark hold dolibarr-erpcrm

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

dnf --showduplicates list dolibarr-erpcrm sudo dnf downgrade dolibarr-erpcrm-<VERSION_BEFORE_9.0.0> sudo dnf versionlock add dolibarr-erpcrm

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-2026-81730?

dolibarr erp\/crm: upgrade to 24.0.0. Exact commands for each OS are on this page.

Is CVE-2026-81730 being exploited?

CVE-2026-81730 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-2026-81730 affect?

CVE-2026-81730 affects dolibarr erp\/crm. Severity is high (CVSS 8.2). Dolibarr 9.0.0 through 23.0.4 saves inbound email attachments under the name supplied in the message's MIME headers without reducing it to a safe basename. The global saveAttachment() in htdocs/emailcollector/lib/emailcollector.lib.php buil

How urgent is CVE-2026-81730?

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

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-22666 HIGH 7.2 UPGRADE Dolibarr ERP/CRM versions prior to 23.0.2 contain an authenticated remote code execution vulnerability in the
CVE-2026-77923 MEDIUM 4.3 UPGRADE Dolibarr 21.0.0 before 24.0.0 contains an authorization bypass vulnerability caused by an inverted boolean con
CVE-2026-81729 MEDIUM 6.5 UPGRADE Dolibarr before 23.0.4 authorizes REST API document deletion against the wrong permission
CVE-2026-81728 HIGH 8.1 UPGRADE Dolibarr before 24.0.0 contains a SQL injection in its CSV and XLSX import wizard

References

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