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CVE-2026-17543

PHP SQL injection

9.8 CRITICALEPSS 0.33%
  1. Published30 Jul 2026

Description

Improper escaping of backslashes in attacker-provided parameters would allow for trivial SQL injection in PHP versions from 8.2.* before 8.2.33, from 8.3.* before 8.3.33, from 8.4.* before 8.4.24, and from 8.5.* before 8.5.9.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

PHP≥ 8.2.0 < 8.2.33 · ≥ 8.3.0 < 8.3.33 · ≥ 8.4.0 < 8.4.24 · ≥ 8.5.0 < 8.5.9

Remediation

Fixed in
PHP≥ 8.2.33

References

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Frequently asked

Is CVE-2026-17543 being actively exploited?

CVE-2026-17543 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.33%.

How severe is CVE-2026-17543?

CVE-2026-17543 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.33% probability of exploitation.

Which products are affected by CVE-2026-17543?

Affected products include PHP.

How do I fix CVE-2026-17543?

Upgrade affected software to a fixed version, for example PHP 8.2.33 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-17543 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.