What is CVE-2023-26859?

CVE-2023-26859 is a critical-severity vulnerability in Brevo, classified under SQL Injection. CVSS score: 9.8/10. Published 2023-07-26.

How severe is CVE-2023-26859?

Critical severity. CVSS v3 base score is 9.8 out of 10.

SQL Injection in Brevo

CVE-2023-26859

SQL injection vulnerability found in PrestaShop sendinblue v.4.0.15 and before allow a remote attacker to gain privileges via the ajaxOrderTracking.php component.

Vulnerability class: SQL Injection

Published 2023-07-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Brevo

Weakness classification (CWE)

CWE-89 — SQL Injection

References

addons.prestashop.com/en/newsletter-sms/8300-sendinblue-all-in-one-marketing-to… (Vendor Advisory)
security.friendsofpresta.org/modules/2023/07/25/sendinblue.html (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-26859?: CVE-2023-26859 is a critical-severity vulnerability in Brevo, classified under SQL Injection. CVSS score: 9.8/10. Published 2023-07-26.
How severe is CVE-2023-26859?: Critical severity. CVSS v3 base score is 9.8 out of 10.