CVE-2026-1299— email BytesGenerator header injection due to unquoted newlines
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I. Basic Information for CVE-2026-1299
Vulnerability Information
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Vulnerability Title
email BytesGenerator header injection due to unquoted newlines
Source: NVD (National Vulnerability Database)
Vulnerability Description
The email module, specifically the "BytesGenerator" class, didn’t properly quote newlines for email headers when serializing an email message allowing for header injection when an email is serialized. This is only applicable if using "LiteralHeader" writing headers that don't respect email folding rules, the new behavior will reject the incorrectly folded headers in "BytesGenerator".
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
CPython 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CPython是Python基金会的一个用C语言实现的Python解释器。 CPython存在安全漏洞，该漏洞源于email module序列化电子邮件时未正确引用换行符，可能导致标头注入。
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 |
|---|---|---|---|---|
| Python Software Foundation | CPython | 0 ~ 3.10.20 | - |
II. Public POCs for CVE-2026-1299
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|---|
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IV. Related Vulnerabilities
Same product: CPython
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Out-of-bounds read/write during remote profiling and asyncio - CVE-2026-4786
Incomplete mitigation of CVE-2026-4519, %action expansion fo
Same vendor: Python Software Foundation
- CVE-2026-3087
shutil.unpack_archive() doesn't check for Windows absolute p - CVE-2026-6019
BaseCookie.js_output() does not neutralize embedded characte - CVE-2026-3298
Out-of-bounds write in Windows asyncio.ProacterEventLoop.soc - CVE-2026-5713
Out-of-bounds read/write during remote profiling and asyncio - CVE-2026-4786
Incomplete mitigation of CVE-2026-4519, %action expansion fo
Same weakness: CWE-93
- CVE-2026-42257
net-imap: Command Injection via "raw" arguments to multiple - CVE-2026-41570
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Pi-hole FTL remote code execution via newline injection in d - CVE-2026-34458
Sandboxie-Plus privilege escalation via INI CRLF injection b
V. Comments for CVE-2026-1299
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