Medium Insecure deserialization

CVE-2026-110874 — Dolibarr before 23.0.4 PHP Object Injection via jsonOrUnserialize()

Dolibarr before 23.0.4 contains a PHP object injection vulnerability in jsonOrUnserialize() in functions.lib.php, which calls unserialize() without class restrictions when json_decode() fails. Attackers able to write stored extrafields, export configurations or blocked log entries can plant serialized objects that trigger gadget chains for code execution or file manipulation.

Published Oct 15, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: VulnCheck

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Dolibarr

CVSS base

6.6

Medium · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Dolibarr Dolibarr).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (insecure deserialization), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Dolibarr	Dolibarr	< 23.0.4	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

High

Privileges required

High

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.5	CVSS 4.0	High	—	—	disclosure@vulncheck.com via NIST National Vulnerability Database
7.5	CVSS 4.0	High	—	—	VulnCheck via CVE Program (cve.org) e CISA ADP
6.6	CVSS 3.1	Medium	0.7	5.9	disclosure@vulncheck.com via NIST National Vulnerability Database
6.6	CVSS 3.1	Medium	—	—	VulnCheck via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H (score shown at the top: disclosure@vulncheck.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-502 · Deserialization of Untrusted Data

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Monitor serialized objects in requests and unexpected processes spawned by the runtime.

web/proxy/WAF logsnetwork IDS/IPSendpoint telemetry (EDR)application logs

Timeline

What happened to this CVE, newest first.

2026
Affected products added · dolibarr/dolibarr
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 6.6
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Deferred
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Oct 15, 2026 · VulnCheck

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

4 on the record

github.com/Dolibarr/dolibarr/pull/38530
issue-tracking, patch, NIST National Vulnerability Database
github.com/Dolibarr/dolibarr/commit/17658fcaefdaabe13685e566e5f12d5fbd4f4a5c
patch, NIST National Vulnerability Database
www.vulncheck.com/advisories/dolibarr-before-23.0.4-php-object-injection-via-jsonorunse
third-party-advisory, NIST National Vulnerability Database
github.com/Dolibarr/dolibarr
product, NIST National Vulnerability Database

Elsewhere on this site

Dolibarr
every CVE for this vendor

Insecure deserialization
same class

CWE-502
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-107706 Dolibarr before 24.0.2 Incorrect Authorization via updateextrafield.php 7d
Medium CVE-2026-77923 Dolibarr 21.0.0 < 24.0.0 Authorization Bypass via clonetasks Mass Action Aug 24, 2026
Medium CVE-2026-71511 Dolibarr < 24.0.0 Members REST API Sensitive Data Exposure via Member Endpoints Aug 24, 2026
Medium CVE-2026-71510 Dolibarr < 24.0.0 Users REST API SQL Injection via filter parameter Aug 24, 2026
Medium CVE-2026-71509 Dolibarr < 24.0.0 Expense Report REST API Improper Authorization via Update Endpoint Aug 24, 2026
Medium CVE-2026-71508 Dolibarr < 24.0.0 REST API Improper Authorization via User Update Endpoint Aug 24, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-110874 is "Dolibarr before 23.0.4 PHP Object Injection via jsonOrUnserialize()", rated Medium. It affects Dolibarr (Dolibarr); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.6 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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