---
title: "symfony vulnerabilities: CVEs, CISA KEV and security advisories"
url: https://radicalnotion.ai/vendor/symfony
type: vendor
description: "symfony has 150 published CVEs, 0 in CISA KEV and 8 with public exploits."
updated: 2026-11-06
source: RadicalNotion.AI
license: CC BY-NC 4.0 (https://creativecommons.org/licenses/by-nc/4.0/)
---

# symfony vulnerabilities

- **Published CVEs:** 150
- **In CISA KEV:** 0
- **With a public exploit:** 8
- **With a patch:** 149
- **Average CVSS:** 6.7
- **CVEs in the last two years:** 79
- **First CVE:** 2005-07-14
- **Latest CVE:** 2026-11-06

## Severity breakdown

| Severity | CVEs |
| --- | --- |
| Critical | 11 |
| High | 59 |
| Medium | 63 |
| Low | 17 |
| Unscored | 0 |

## Most affected products

| Product | CVEs |
| --- | --- |
| [symfony](https://radicalnotion.ai/vendor/symfony/symfony) | 108 |
| [symfony/symfony](https://radicalnotion.ai/vendor/symfony/symfony-symfony) | 90 |
| [twig](https://radicalnotion.ai/vendor/symfony/twig) | 25 |
| [symfony/security-http](https://radicalnotion.ai/vendor/symfony/symfony-security-http) | 19 |
| [symfony/security](https://radicalnotion.ai/vendor/symfony/symfony-security) | 17 |
| [security-http](https://radicalnotion.ai/vendor/symfony/security-http) | 11 |
| [symfony/http-foundation](https://radicalnotion.ai/vendor/symfony/symfony-http-foundation) | 11 |
| [ux](https://radicalnotion.ai/vendor/symfony/ux) | 10 |

## Most common weakness types

| CWE | Name | CVEs |
| --- | --- | --- |
| [CWE-79](https://radicalnotion.ai/cwe/cwe-79) | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | 15 |
| [CWE-693](https://radicalnotion.ai/cwe/cwe-693) | Protection Mechanism Failure | 10 |
| [CWE-287](https://radicalnotion.ai/cwe/cwe-287) | Improper Authentication | 7 |
| [CWE-94](https://radicalnotion.ai/cwe/cwe-94) | Improper Control of Generation of Code ('Code Injection') | 7 |
| [CWE-863](https://radicalnotion.ai/cwe/cwe-863) | Incorrect Authorization | 6 |
| [CWE-20](https://radicalnotion.ai/cwe/cwe-20) | Improper Input Validation | 6 |
| [CWE-184](https://radicalnotion.ai/cwe/cwe-184) | Incomplete List of Disallowed Inputs | 5 |
| [CWE-200](https://radicalnotion.ai/cwe/cwe-200) | Exposure of Sensitive Information to an Unauthorized Actor | 4 |

## Assigning CNAs

| CNA | CVEs |
| --- | --- |
| [GitHub\_M](https://radicalnotion.ai/cna/github-m) | 85 |
| [mitre](https://radicalnotion.ai/cna/mitre) | 45 |
| [Checkmarx](https://radicalnotion.ai/cna/checkmarx) | 19 |
| [VulnCheck](https://radicalnotion.ai/cna/vulncheck) | 1 |

## CVEs by year

| Year | CVEs published |
| --- | --- |
| 2019 | 13 |
| 2020 | 5 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 6 |
| 2024 | 9 |
| 2025 | 2 |
| 2026 | 77 |

## Latest CVEs

| CVE | Title | Severity | CVSS | EPSS | CISA KEV | Published |
| --- | --- | --- | --- | --- | --- | --- |
| CVE-2026-123824 | Symfony: XXE (Local File Read) in Config XmlUtils::parse() via validateOnParse = true | low | 2.3 | 0.3% | No | 2026-11-06 |
| CVE-2026-122053 | Symfony: ObjectNormalizer Dotted-Key Property-Path Traversal Bypasses #\[Ignore\] on Nested Objects | medium | 6.9 | 0.3% | No | 2026-11-06 |
| CVE-2026-118515 | Symfony: The Serializer Builds UploadedFile Objects From Request Data, Letting a Client Point an Upload at Any Server File | high | 8.4 | 0.6% | No | 2026-11-06 |
| CVE-2026-121623 | Symfony: DataUriNormalizer Opens Data URIs With a Non-Lowercase Scheme as Local Files, Letting a Client Read Any Server File | high | 8.2 | 0.6% | No | 2026-11-06 |
| CVE-2026-123792 | Symfony: Exponential and Quadratic Parse Times in the YAML Parser Let a Single Document Hold a Process | high | 8.7 | 0.5% | No | 2026-11-06 |
| CVE-2026-123339 | Symfony: Inline Fragments Let Untrusted Forwarded Headers Set the Host, Scheme and Port of the URLs Generated for the Main Request | low | 2.3 | 0.2% | No | 2026-11-06 |
| CVE-2026-118514 | Symfony: HEAD Requests Bypass the methods Option of security.access\_control Rules and Firewalls | medium | 6.3 | 0.6% | No | 2026-11-06 |
| CVE-2026-123746 | Symfony: Programmatic Logins Skip the checkPostAuth() Method of User Checkers | low | 2.3 | 0.3% | No | 2026-11-06 |
| CVE-2026-121949 | Symfony: HtmlSanitizer Does Not URL-Sanitize srcset and imagesrcset: Media Scheme and Host Allow-List Bypass | low | 2.3 | 0.2% | No | 2026-11-05 |
| CVE-2026-118517 | Symfony: HtmlSanitizer allowLinkHosts() / allowMediaHosts() Bypass via URLs Without a Well-Formed Authority (Incomplete Fix for CVE-2026-45066) | low | 2.3 | 0.3% | No | 2026-11-05 |
| CVE-2026-123125 | Symfony: Ip Constraint public/private Modes Accept IPv4-Mapped and IPv4-Compatible IPv6 Addresses allowing SSRF Filter Bypass | medium | 6.3 | 0.2% | No | 2026-11-05 |
| CVE-2026-123119 | Symfony: NoPrivateNetworkHttpClient Does Not Pin the Checked IP of Cached Hosts, Letting DNS Rebinding Enumerate Internal Ports (Incomplete Fix for CVE-2024-50342) | low | 2.3 | 0.2% | No | 2026-11-05 |

## Frequently asked questions

### How many CVEs does symfony have?

symfony has 150 published CVE records since 2005, including 79 in the last two years.

### How many symfony CVEs are in CISA KEV?

None of symfony's CVEs are currently listed in CISA's Known Exploited Vulnerabilities catalog.

### Which symfony products have the most CVEs?

The symfony products with the most published CVEs are symfony, symfony/symfony, twig, symfony/security-http, symfony/security.

### What are the most common weakness types in symfony CVEs?

symfony's CVEs most often map to these CWE weakness types: CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')), CWE-693 (Protection Mechanism Failure), CWE-287 (Improper Authentication), CWE-94 (Improper Control of Generation of Code ('Code Injection')).

### Are there public exploits for symfony vulnerabilities?

Yes — 8 of symfony's CVEs have a known public exploit.

### How many critical symfony vulnerabilities are there?

symfony has 11 critical and 59 high-severity CVEs.

### What is the average severity of symfony CVEs?

The average CVSS base score across symfony's scored CVEs is 6.7.

## Related vendors

- [10Web](https://radicalnotion.ai/vendor/10web) (152 CVEs)
- [FlowiseAI](https://radicalnotion.ai/vendor/flowiseai) (152 CVEs)
- [Check Point](https://radicalnotion.ai/vendor/checkpoint) (151 CVEs)
- [Ruby on Rails](https://radicalnotion.ai/vendor/rubyonrails) (151 CVEs)
- [HDFGroup](https://radicalnotion.ai/vendor/hdfgroup) (151 CVEs)
- [mandrakesoft](https://radicalnotion.ai/vendor/mandrakesoft) (151 CVEs)
- [Kaspersky](https://radicalnotion.ai/vendor/kaspersky) (149 CVEs)
- [Ubuntu](https://radicalnotion.ai/vendor/ubuntu) (148 CVEs)

---

Source: [RadicalNotion.AI](https://radicalnotion.ai/vendor/symfony). Licensed CC BY-NC 4.0; attribute RadicalNotion.AI and link the source page when you reuse this data.