Seth Larson

23 exploits Active since Apr 2026
CVE-2026-3298 WRITEUP HIGH WRITEUP
Out-of-bounds write in Windows asyncio.ProacterEventLoop.sock_recvfrom_into() when using nbytes
The method "sock_recvfrom_into()" of "asyncio.ProacterEventLoop" (Windows only) was missing a boundary check for the data buffer when using nbytes parameter. This allowed for an out-of-bounds buffer write if data was larger than the buffer size. Non-Windows platforms are not affected.
CVE-2026-3276 WRITEUP MEDIUM WRITEUP
Python Software Foundation CPython - Potential DoS via Quadratic Complexity in unicodedata.normalize()
unicodedata.normalize() can take excessive CPU time when processing specially crafted Unicode input containing long runs of combining characters with alternating Canonical Combining Class values. This affects all normalization forms.
CVE-2026-0864 WRITEUP MEDIUM WRITEUP
Configuration Injection via Carriage Return (\r) in write() method
When using the "configparser" module to write configuration files containing multi-line text values with carriage return characters (\r) the resulting file could be injected with unexpected keys and values if the attacker controls the written value.
CVE-2026-1502 WRITEUP MEDIUM WRITEUP
HTTP client proxy tunnel headers not validated for CR/LF
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
CVE-2026-1502 WRITEUP MEDIUM WRITEUP
HTTP client proxy tunnel headers not validated for CR/LF
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
CVE-2026-0864 WRITEUP MEDIUM WRITEUP
Configuration Injection via Carriage Return (\r) in write() method
When using the "configparser" module to write configuration files containing multi-line text values with carriage return characters (\r) the resulting file could be injected with unexpected keys and values if the attacker controls the written value.
CVE-2026-0864 WRITEUP MEDIUM WRITEUP
Configuration Injection via Carriage Return (\r) in write() method
When using the "configparser" module to write configuration files containing multi-line text values with carriage return characters (\r) the resulting file could be injected with unexpected keys and values if the attacker controls the written value.
CVE-2026-0864 WRITEUP MEDIUM WRITEUP
Configuration Injection via Carriage Return (\r) in write() method
When using the "configparser" module to write configuration files containing multi-line text values with carriage return characters (\r) the resulting file could be injected with unexpected keys and values if the attacker controls the written value.
CVE-2026-0864 WRITEUP MEDIUM WRITEUP
Configuration Injection via Carriage Return (\r) in write() method
When using the "configparser" module to write configuration files containing multi-line text values with carriage return characters (\r) the resulting file could be injected with unexpected keys and values if the attacker controls the written value.
CVE-2026-3276 WRITEUP MEDIUM WRITEUP
Python Software Foundation CPython - Potential DoS via Quadratic Complexity in unicodedata.normalize()
unicodedata.normalize() can take excessive CPU time when processing specially crafted Unicode input containing long runs of combining characters with alternating Canonical Combining Class values. This affects all normalization forms.
CVE-2026-3276 WRITEUP MEDIUM WRITEUP
Python Software Foundation CPython - Potential DoS via Quadratic Complexity in unicodedata.normalize()
unicodedata.normalize() can take excessive CPU time when processing specially crafted Unicode input containing long runs of combining characters with alternating Canonical Combining Class values. This affects all normalization forms.
CVE-2026-1502 WRITEUP MEDIUM WRITEUP
HTTP client proxy tunnel headers not validated for CR/LF
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
CVE-2026-3276 WRITEUP MEDIUM WRITEUP
Python Software Foundation CPython - Potential DoS via Quadratic Complexity in unicodedata.normalize()
unicodedata.normalize() can take excessive CPU time when processing specially crafted Unicode input containing long runs of combining characters with alternating Canonical Combining Class values. This affects all normalization forms.
CVE-2026-1502 WRITEUP MEDIUM WRITEUP
HTTP client proxy tunnel headers not validated for CR/LF
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
CVE-2026-3276 WRITEUP MEDIUM WRITEUP
Python Software Foundation CPython - Potential DoS via Quadratic Complexity in unicodedata.normalize()
unicodedata.normalize() can take excessive CPU time when processing specially crafted Unicode input containing long runs of combining characters with alternating Canonical Combining Class values. This affects all normalization forms.
CVE-2026-3298 WRITEUP HIGH WRITEUP
Out-of-bounds write in Windows asyncio.ProacterEventLoop.sock_recvfrom_into() when using nbytes
The method "sock_recvfrom_into()" of "asyncio.ProacterEventLoop" (Windows only) was missing a boundary check for the data buffer when using nbytes parameter. This allowed for an out-of-bounds buffer write if data was larger than the buffer size. Non-Windows platforms are not affected.
CVE-2026-6019 WRITEUP MEDIUM WRITEUP
BaseCookie.js_output() does not neutralize embedded characters
http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence </script> inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value.
CVSS 6.1
CVE-2026-1502 WRITEUP MEDIUM WRITEUP
HTTP client proxy tunnel headers not validated for CR/LF
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
CVE-2026-3298 WRITEUP HIGH WRITEUP
Out-of-bounds write in Windows asyncio.ProacterEventLoop.sock_recvfrom_into() when using nbytes
The method "sock_recvfrom_into()" of "asyncio.ProacterEventLoop" (Windows only) was missing a boundary check for the data buffer when using nbytes parameter. This allowed for an out-of-bounds buffer write if data was larger than the buffer size. Non-Windows platforms are not affected.
CVE-2026-6019 WRITEUP MEDIUM WRITEUP
BaseCookie.js_output() does not neutralize embedded characters
http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence </script> inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value.
CVSS 6.1
CVE-2026-6019 WRITEUP MEDIUM WRITEUP
BaseCookie.js_output() does not neutralize embedded characters
http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence </script> inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value.
CVSS 6.1
CVE-2026-3298 WRITEUP HIGH WRITEUP
Out-of-bounds write in Windows asyncio.ProacterEventLoop.sock_recvfrom_into() when using nbytes
The method "sock_recvfrom_into()" of "asyncio.ProacterEventLoop" (Windows only) was missing a boundary check for the data buffer when using nbytes parameter. This allowed for an out-of-bounds buffer write if data was larger than the buffer size. Non-Windows platforms are not affected.
CVE-2026-1502 WRITEUP MEDIUM WRITEUP
HTTP client proxy tunnel headers not validated for CR/LF
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.