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UBUNTU-CVE-2026-45755

0
Medium
Vulnerabilitygcveosvubuntu-cve-2026-45755ubuntu-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-pro-22-04-ltsubuntu-pro-24-04-ltsubuntu-25-10ubuntu-26-04-lts
Published: 07/14/2026 (07/14/2026, 19:17:00 UTC)
Source: GCVE Database
Product: symfony

Description

A vulnerability in the Symfony PHP framework prior to versions 7.4.12 and 8.0.12 allows unauthenticated attackers to inject forged Mailtrap delivery, bounce, open, click, or spam events. This occurs because the MailtrapRequestParser::doParse() method receives the configured webhook secret but ignores the X-Mt-Signature HMAC header, failing to authenticate POST requests properly. The issue is fixed in Symfony versions 7.4.12 and 8.0.12.

CVSS v4.0

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
None
Vuln. Integrity
Low
Vuln. Availability
None
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Affected software

Ubuntu:16.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]?arch=source&distro=xenial
Affected versions
=2.7.1+dfsg-1=2.7.5+dfsg-1=2.7.9+dfsg-1=2.7.9+dfsg-1ubuntu2=2.7.10-0ubuntu2
Ubuntu:Pro:18.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu0.1+esm2?arch=source&distro=esm-apps/bionic
Affected versions
=2.8.7+dfsg-1.3ubuntu1=3.4.3+dfsg-1ubuntu4=3.4.6+dfsg-1=3.4.6+dfsg-1ubuntu0.1=3.4.6+dfsg-1ubuntu0.1+esm1=3.4.6+dfsg-1ubuntu0.1+esm2
Ubuntu:Pro:20.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu1+esm2?arch=source&distro=esm-apps/focal
Affected versions
=4.3.4+dfsg-1ubuntu1=4.3.8+dfsg-1ubuntu1=4.3.8+dfsg-1ubuntu1+esm1=4.3.8+dfsg-1ubuntu1+esm2
Ubuntu:Pro:22.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu8+esm1?arch=source&distro=esm-apps/jammy
Affected versions
=5.2.6+dfsg-1ubuntu7=5.4.4+dfsg-1ubuntu8=5.4.4+dfsg-1ubuntu8+esm1
Ubuntu:Pro:24.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-3ubuntu3+esm1?arch=source&distro=esm-apps/noble
Affected versions
=5.4.23+dfsg-1ubuntu1=5.4.35+dfsg-3ubuntu1=6.4.5+dfsg-3ubuntu2=6.4.5+dfsg-3ubuntu3=6.4.5+dfsg-3ubuntu3+esm1
Ubuntu:25.10more threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-1?arch=source&distro=questing
Affected versions
=6.4.18+dfsg-1ubuntu1=6.4.21+dfsg-2=6.4.21+dfsg-2ubuntu1=6.4.24+dfsg-1
Ubuntu:26.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu1?arch=source&distro=resolute
Affected versions
=6.4.24+dfsg-1=7.4.5+dfsg-1ubuntu1=7.4.6+dfsg-2ubuntu1=7.4.7+dfsg-1ubuntu1

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 07/16/2026, 12:44:47 UTC

Technical Analysis

Symfony versions prior to 7.4.12 and 8.0.12 contain a vulnerability in the MailtrapRequestParser::doParse() function where the configured webhook secret is received but the X-Mt-Signature HMAC header is ignored. This allows unauthenticated POST requests to inject forged Mailtrap events such as delivery, bounce, open, click, or spam events. The vulnerability is resolved in versions 7.4.12 and 8.0.12.

Potential Impact

Unauthenticated attackers can send forged Mailtrap event data to affected Symfony applications, potentially misleading event processing systems that rely on Mailtrap webhook data. This could affect the integrity of event tracking and related application logic that depends on these events.

Mitigation Recommendations

Upgrade Symfony to version 7.4.12 or 8.0.12 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory. Patch status is confirmed fixed in these versions.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-45755
Osv Schema Version
1.7.0
Aliases
[]
Ecosystems
["Ubuntu:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
Database Specific Severity
null
Cvss Version
4.0

Threat ID: 6a58b4aa68715ace43da926f

Added to database: 07/16/2026, 10:38:34 UTC

Last enriched: 07/16/2026, 12:44:47 UTC

Last updated: 07/16/2026, 12:44:47 UTC

Views: 2

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