CVE•Published 2026-07-14•Modified 2026-07-14•0 articles on news•5 live references•NVD data

CVE-2026-48747

Vulnerability data via NVD (ingested)

CVSS v3.1

—

EPSS percentile

—

Weaknesses (CWE)

CWE-347Improper Verification of Cryptographic Signature CWE-757Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 7.4.13 and 8.0.13, MailomatRequestParser::validateSignature() parsed X-MOM-Webhook-Signature as algo=signature and passed the request-selected algorithm to hash_hmac(), allowing a signature algorithm downgrade instead of enforcing Mailomat's documented SHA-256 webhook signature. This issue is fixed in versions 7.4.13 and 8.0.13.

Timeline

Published 2026-07-14

Modified 2026-07-14

External references

NVD MITRE Exploit-DB GitHub PoC 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).

Shodan · vuln tag0 hosts

vuln:CVE-2026-48747

Hosts Shodan has explicitly fingerprinted as vulnerable.

More intel sources (5)

Shodan report

vuln:CVE-2026-48747

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2026-48747

Censys host search filtered to this CVE id.

grep.app

CVE-2026-48747