CVE•Published 2026-07-14•Modified 2026-07-15•0 articles on news•4 live references•NVD data

CVE-2026-45305Sensiolabs · Symfony

Vulnerability data via NVD (ingested)

CVSS v3.1

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS percentile

—

Weaknesses (CWE)

CWE-1333Inefficient Regular Expression Complexity

Description

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, Symfony\Component\Yaml\Parser::cleanup() used regular expressions with overlapping quantifiers for YAML directive, comment, and document marker cleanup, allowing crafted input to make parsing hang for an arbitrarily long time. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

Timeline

Published 2026-07-14

Modified 2026-07-15

External references

NVD MITRE Exploit-DB VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common). Live host counts are a Premium feature.

Shodan · vuln tag

vuln:CVE-2026-45305

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Sensiolabs Symfony"

All exposed Sensiolabs Symfony instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Symfony"

HTTP body or banner mentions "Symfony" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-45305