high CVSS 7.3

CVE-2026-45073·PHP vulnerability

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, PdoAdapter::doClear() builds a DELETE statement using a namespace derived from the caller-supplied $prefix without binding or escaping it, allowing a caller able to influence $prefix to break out of the LIKE literal and alter query semantics or deletion scope. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

Severity
high
Software
PHP
Fixed in
8.0.12
Published
2026-07-14

Affected versions

From: 8.0.0

Until: 8.0.12

Fixed in: 8.0.12

How to fix this CVE

Update PHP and Symfony to patched versions immediately to mitigate SQL injection risks in the cache adapter layer. Symfony versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12 or later contain the fix that properly escapes and binds query parameters in the PdoAdapter::doClear() method. If you cannot update immediately, review and restrict access to any code paths that allow user-controlled input to influence cache key prefixes.

sudo dnf update php

Defensia detects this vulnerability

What an exploitation attempt looks like

Sample log line indicative of exploitation attempts:

SELECT or DELETE statements in application database logs containing LIKE clauses with cache table prefixes followed by unexpected wildcard expansions or table names outside the intended cache namespace

WAF mitigation (if patching is not yet possible)

Add this rule to your WAF to block exploitation attempts while you schedule the patch. 

Implement input validation rules that restrict cache key prefix parameters to alphanumeric characters and underscores only, rejecting any input containing SQL wildcards or escape sequences before they reach the application layer

How to check if you are affected

  1. Run 'php -v' to check the installed PHP version and compare against affected Symfony versions (8.0.0 to 8.0.12)
  2. Verify Symfony framework version by checking 'composer show symfony/symfony' or examining vendor/symfony/symfony/VERSION if installed via Composer
  3. Search application logs for DELETE queries with suspicious LIKE patterns or unexpected table prefixes in cache-related database operations
  4. After patching, confirm PHP and Symfony versions no longer match the vulnerable range (8.0.0-8.0.12) and re-run the version checks above

FAQ

What is CVE-2026-45073?

This is a SQL injection vulnerability in Symfony's PdoAdapter cache clearing method where user-controlled cache key prefixes are not properly escaped before inclusion in DELETE statements, potentially allowing attackers to manipulate query semantics or expand deletion scope.

Is CVE-2026-45073 being actively exploited?

No, this vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog and no public exploits are currently available.

What versions of PHP are affected by CVE-2026-45073?

Symfony framework versions 8.0.0 through 8.0.11 are vulnerable; version 8.0.12 and later contain the fix. Earlier Symfony branches (5.4.0-5.4.51, 6.4.0-6.4.39, 7.4.0-7.4.11) are also affected with their respective patched versions.

How do I check if my server is vulnerable to CVE-2026-45073?

Run 'composer show symfony/symfony' to display your installed Symfony version. If it falls within 8.0.0 to 8.0.11 (or the vulnerable ranges for other major versions), your server requires patching.

Does Defensia detect CVE-2026-45073?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If PHP with vulnerable Symfony components is installed on a monitored server, CVE-2026-45073 will appear in your dashboard with remediation steps.

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References

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