HOMEVULNERABILITIESCVE-2026-48747
MEDIUM

CVE-2026-48747

CWE-347Published: July 14, 2026· Updated: Jul 15, 2026

5.3
CVSS v3.1
EPSS:0.24%probability of exploitation in 30 daysPercentile:14.7th

Official 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.

NVD Source

Technical Analysis

CVE-2026-48747 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected Vendors & Products

sensiolabs1 product(s)
symfony
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/symfony/symfony/commit/bdfe9fe0d94d33dfaca0bc2fe0b00b54767b0c88
PATCHhttps://github.com/symfony/symfony/security/advisories/GHSA-rrj9-5q2j-4gvr

All References (4)

→
https://github.com/symfony/symfony/commit/bdfe9fe0d94d33dfaca0bc2fe0b00b54767b0c88Patch
→
https://github.com/symfony/symfony/releases/tag/v7.4.13Product · Release Notes
→
https://github.com/symfony/symfony/releases/tag/v8.0.13Product · Release Notes
→
https://github.com/symfony/symfony/security/advisories/GHSA-rrj9-5q2j-4gvrPatch · Vendor Advisory

Quick Facts

CVE IDCVE-2026-48747
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-347
CISA KEVNo
EPSS (30d)0.24%
Affected1 vendor(s)
PublishedJul 14, 2026

Related CVEs (CWE-347)

CVE-2026-56451
10.0
CVE-2024-32962
10.0
CVE-2026-48558
KEV10.0
CVE-2026-44748
9.9
CVE-2019-1010161
9.8
CVE-2026-15013
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-48747 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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