CVE-2026-45133— Symfony: [Yaml] Harden the parser when handling untrusted input
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I. Basic Information for CVE-2026-45133
Vulnerability Information
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Vulnerability Title
Symfony: [Yaml] Harden the parser when handling untrusted input
Source: NVD (National Vulnerability Database)
Vulnerability Description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, when the parser is exposed to attacker-controlled input, deeply nested mappings or sequences cause both the block-level (Parser::parseBlock()) and inline (Inline::parseSequence() / Inline::parseMapping()) parsers to recurse without a depth limit. A crafted document exhausts the PHP stack and crashes the worker. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的递归
Source: NVD (National Vulnerability Database)
Vulnerability Title
Symfony 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Symfony是Symfony组织开源的一个用于 Web 和控制台应用程序的 PHP 框架以及一组可重用的 PHP 组件。 Symfony 5.4.52之前版本、6.4.40之前版本、7.4.12之前版本和8.0.12之前版本存在资源管理错误漏洞，该漏洞源于解析器在处理深层嵌套的映射或序列时未设置深度限制，可能导致攻击者利用特制文档耗尽PHP堆栈并导致工作进程崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-45133
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Patches & Fixes for CVE-2026-45133 (2)
Vendor Advisories for CVE-2026-45133 (1)
Vendor Pages for CVE-2026-45133 (1)
Other References for CVE-2026-45133 (1)
Same Patch Batch · symfony · 2026-07-14 · 30 CVEs total
| CVE-2026-45070 | Symfony: Email Header Injection via Non-Token Characters in Mime Parameter Names | |
| CVE-2026-46644 | symfony/polyfill-intl-idn accepts xn-- labels whose Punycode payload decodes to ASCII-only | |
| CVE-2026-48761 | Symfony: HtmlSanitizer UrlAttributeSanitizer Misses URL Attributes on <object>, <applet>, | |
| CVE-2026-48736 | Symfony: IpUtils::PRIVATE_SUBNETS Omits IPv6 Transition Forms (6to4, NAT64, Teredo, IPv4-c | |
| CVE-2026-48747 | Symfony: Mailomat Mailer Webhook Parser Reads the HMAC Algorithm from the Request: Signatu | |
| CVE-2026-48760 | Symfony: HtmlSanitizer URL Parser Deny Gates Underinclusive: Percent-Encoded BiDi Marks an | |
| CVE-2026-48489 | Symfony: Security Firewall Bypass via failure_forward Subrequest: Unauthenticated Access t | |
| CVE-2026-48784 | Symfony: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Gener | |
| CVE-2026-47212 | Symfony: Twilio Notifier Webhook Parser Never Verifies the X-Twilio-Signature HMAC: Unauth | |
| CVE-2026-45068 | Symfony: Argument Injection in SendmailTransport via Dash-Prefixed Recipient Address | |
| CVE-2026-45071 | Symfony: XXE (Local File Disclosure) in DomCrawler::addXmlContent() via validateOnParse = | |
| CVE-2026-47767 | Symfony: SymfonyRuntime CVE-2024-50340 Patch Bypass: Web Requests Can Still Set APP_ENV/AP | |
| CVE-2026-45075 | Symfony: HEAD Request Bypasses methods: ['GET'] Filter in #[IsGranted] / #[IsSignatureVali | |
| CVE-2026-45304 | Symfony: YAML Parser Exponential Memory Allocation via Recursive Collection-Alias Expansio | |
| CVE-2026-45063 | Symfony: Identity Spoofing via Unanchored DN Regex in X509Authenticator | |
| CVE-2026-45756 | Symfony: JsonPath Evaluates Attacker-Controlled Regular Expressions in match()/search() Wi | |
| CVE-2026-45754 | Symfony: Mailjet Mailer Webhook Parser Never Verifies the Configured Secret — Unauthentica | |
| CVE-2026-45069 | Symfony: OidcTokenHandler Accepts JWTs Missing aud/iss/exp Claims | |
| CVE-2026-45753 | Symfony: HtmlSanitizer UrlAttributeSanitizer Omits action/formaction/poster/cite — javascr | |
| CVE-2026-45072 | Symfony: Stored XSS in WebProfiler CodeExtension::fileExcerpt() — Unescaped Non-PHP File R |
Showing top 20 of 30 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: symfony
- CVE-2026-48761
Symfony: HtmlSanitizer UrlAttributeSanitizer Misses URL Attr - CVE-2026-48747
Symfony: Mailomat Mailer Webhook Parser Reads the HMAC Algor - CVE-2026-48489
Symfony: Security Firewall Bypass via failure_forward Subreq - CVE-2026-48760
Symfony: HtmlSanitizer URL Parser Deny Gates Underinclusive: - CVE-2026-48736
Symfony: IpUtils::PRIVATE_SUBNETS Omits IPv6 Transition Form
Same vendor: symfony
- CVE-2026-49215
Symfony UX: CSRF Protection Bypass in symfony/ux-live-compon - CVE-2026-49216
Symfony UX: XSS in symfony/ux-autocomplete via unescaped AJA - CVE-2026-49211
Symfony UX: Information exposure via unescaped LIKE wildcard - CVE-2026-49208
Symfony UX: Format-less date LiveProps parsed with the permi - CVE-2026-49210
Symfony UX: XSS in symfony/ux-live-component via attacker-co
Same weakness: CWE-674
- CVE-2026-64194
Net::DNS versions through 1.55 for Perl allow Denial of Serv - CVE-2026-63760
SurrealDB before 3.1.0 Denial of Service via JSON Parser - CVE-2026-63759
SurrealDB before 3.1.0 Denial of Service nested type annotat - CVE-2026-63737
SurrealDB before 3.1.5 Denial of Service via deep operator c - CVE-2025-71393
SurrealDB before 2.2.2 Memory Exhaustion via Nested Function
V. Comments for CVE-2026-45133
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