Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-45070— Symfony: Email Header Injection via Non-Token Characters in Mime Parameter Names

Quick assessment

Affected
symfony symfony
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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存在输入验证错误漏洞，该漏洞源于ParameterizedHeader验证和编码参数值但逐字发出参数名称，导致从不可信输入派生参数名称的调用方可能包含CRLF或其他非令牌字节并向Content-Type或Content-Disposition等结构化邮件标头注入额外标头。以下版本受到影响：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

AI Predicted 7.5 Difficulty: Easy EPSS 0.39% · P31

Possible ATT&CK Techniques 1 AI

T1559.001 · Component Object Model

Affected Version Matrix 8

VendorProduct Version RangeStatus
symfony mime < 5.4.52 affected
>= 6.0.0-BETA1, < 6.4.40 affected
>= 7.0.0-BETA1, < 7.4.12 affected
>= 8.0.0-BETA1, < 8.0.12 affected
symfony symfony < 5.4.52 affected
>= 6.0.0-BETA1, < 6.4.40 affected
>= 7.0.0-BETA1, < 7.4.12 affected
>= 8.0.0-BETA1, < 8.0.12 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-45070

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Symfony: Email Header Injection via Non-Token Characters in Mime Parameter Names
Source: CVE Program / CVE List V5
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, Symfony\Component\Mime\Header\ParameterizedHeader validates and encodes parameter values but emits parameter names verbatim, allowing a caller that derives a parameter name from untrusted input to include CRLF or other non-token bytes and inject additional headers into rendered structured mail headers such as Content-Type or Content-Disposition. This issue is reported as fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Symfony 输入验证错误漏洞
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存在输入验证错误漏洞，该漏洞源于ParameterizedHeader验证和编码参数值但逐字发出参数名称，导致从不可信输入派生参数名称的调用方可能包含CRLF或其他非令牌字节并向Content-Type或Content-Disposition等结构化邮件标头注入额外标头。以下版本受到影响：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
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

Vendor Product Affected Versions CPE Subscribe
symfony symfony < 5.4.52 -
symfony mime < 5.4.52 -

II. Public POCs for CVE-2026-45070

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-45070

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-45070 (3)

Vendor Advisories for CVE-2026-45070 (1)

Vendor Pages for CVE-2026-45070 (1)

Other References for CVE-2026-45070 (1)

Same Patch Batch · symfony · 2026-07-14 · 30 CVEs total

CVE-2026-45133 Symfony: [Yaml] Harden the parser when handling untrusted input
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 &rarr; →

IV. Related Vulnerabilities

Same product: symfony
Same vendor: symfony
Same weakness: CWE-93

V. Comments for CVE-2026-45070

No comments yet

Leave a comment