Debian Symfony: security vulnerability (CVE-2026-46626)
Published Sources: Debian
What is affected, what to do
The available sources name no fixed version. Check the vendor guidance in the references below.
- Affected
- Debian Symfony
6.4.41+dfsg-0+deb13u1..* - Debian Symfony
5.4.53+dfsg-0+deb12u1..*
- Debian Symfony
Not sure whether and how you are affected? Ask a question about this vulnerability
Metrics
—
Priority
No value is available for this vulnerability.
—
CVSS v3
No value is available for this vulnerability.
—
EPSS score
No value is available for this vulnerability.
Show all metrics
- Severity
- Reserved
Priority (0–325)
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 121.91 Methodology
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- no public PoC known
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
Detection rules
No NEOSEC detection rule is available for this vulnerability yet.
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
Source: Debian Security Advisories
Vendors and products
Affected operating systems
| Linux | debian | symfony | bookworm |
| Linux | debian | symfony | trixie |
Included in the same advisory
| Medium | CVE-2026-48784 | Symfony: Open Redirect | 6.1 | — |
| High | CVE-2026-48736 | Symfony: Incomplete List of Disallowed Inputs | 8.6 | — |
| High | CVE-2026-48489 | Symfony: Incorrect Authorization | 7.5 | — |
| High | CVE-2026-45305 | Symfony: YAML Parser ReDoS via Catastrophic Backtracking in Parser::cleanup() Regex | 7.5 | — |
| High | CVE-2026-45304 | Symfony: XML Entity Expansion | 7.5 | — |
| High | CVE-2026-45133 | Symfony: [Yaml] Harden the parser when handling untrusted input | 7.5 | — |
| High | CVE-2026-45077 | Symfony: Unauthenticated PHP Object Deserialization in MonologBridge server:log Listener | 8.6 | — |
| High | CVE-2026-45073 | Symfony: SQL Injection in PdoAdapter::doClear() via Unsanitized $prefix | 7.3 | — |
| High | CVE-2026-45071 | Symfony: XXE (Local File Disclosure) in DomCrawler::addXmlContent() via validateOnParse = true | 7.5 | — |
| Medium | CVE-2026-45070 | Symfony: Email Header Injection via Non-Token Characters in Mime Parameter Names | 6.5 | — |
| High | CVE-2026-45068 | Symfony: Argument Injection in SendmailTransport via Dash-Prefixed Recipient Address | 7.5 | — |
| Medium | CVE-2026-45067 | Symfony: Email Header / SMTP Command Injection via CRLF in Symfony\Component\Mime\Address | — | — |
| Medium | CVE-2026-45065 | Symfony: Open Redirect | 6.1 | — |
| Critical | CVE-2026-45063 | Symfony: Identity Spoofing via Unanchored DN Regex in X509Authenticator | 9.1 | — |
| High | CVE-2024-50340 | Ability to change environment from query in symfony/runtime | 7.3 | — |
Embed badge
Show the severity and KEV status of this vulnerability on your site – with a link back here. The image is updated hourly.
<a href="https://intel.neosec.eu/en/cve/CVE-2026-46626"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-46626.svg?lang=en" alt="CVE-2026-46626 – NEOSEC Intel" height="20"></a>