PHP vulnerabilities: known CVEs & security history
PHP · Web / Runtime · 20 tracked CVEs · 0 actively exploited · updated September 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all PHP release lines — 20 in total. A CVE here doesn't mean your version is affected — check PHP's current status and the safe version to run.
Known PHP CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2026-17544 | critical | 9.8 | 0% | 2026 |
| CVE-2026-17543 | critical | 9.8 | 0% | 2026 |
| CVE-2026-7261 | critical | 9.8 | 0% | 2026 |
| CVE-2026-6722 | critical | 9.8 | 1% | 2026 |
| CVE-2025-14179 | critical | 9.8 | 0% | 2026 |
| CVE-2026-6104 | critical | 9.1 | 0% | 2026 |
| CVE-2023-0567 | high | 7.7 | 1% | 2023 |
| CVE-2026-7263 | high | 7.5 | 0% | 2026 |
| CVE-2026-7568 | high | 7.5 | 0% | 2026 |
| CVE-2026-7262 | high | 7.5 | 1% | 2026 |
| CVE-2026-7258 | high | 7.5 | 0% | 2026 |
| CVE-2026-7259 | medium | 6.5 | 0% | 2026 |
| CVE-2019-11049 | medium | 6.5 | 4% | 2019 |
| CVE-2026-6735 | medium | 6.1 | 0% | 2026 |
| CVE-2026-14355 | medium | 5.6 | 0% | 2026 |
| CVE-2026-7260 | medium | 5.5 | 0% | 2026 |
| CVE-2019-11050 | medium | 4.8 | 8% | 2019 |
| CVE-2019-11046 | low | 3.7 | 4% | 2019 |
| CVE-2019-11045 | low | 3.7 | 9% | 2019 |
| CVE-2019-11044 | low | 3.7 | 5% | 2019 |
Is my PHP version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your PHP version → · Monitor PHP for new CVEs →
PHP vulnerabilities — frequently asked
How many known vulnerabilities does PHP have?
IsItPatched tracks 20 CVEs for PHP. 6 are critical-severity and 5 high-severity. These span every release line — what matters is whether the version you run is affected.
Does PHP have any actively-exploited vulnerabilities?
None of PHP's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe PHP vulnerability?
Among tracked issues, CVE-2026-17544 (CRITICAL, CVSS 9.8) ranks highest — a Out-of-bounds write weakness.
Is PHP safe to use?
It depends on the version. The latest supported PHP release (8.5.9) clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: PHP security status · PHP end-of-life · actively-exploited CVEs. Always verify against PHP's advisories — see our disclaimer.