Search vulnerabilities

Use the Query Builder to create your own search query, or check out the documentation to learn the search syntax.

Results 387

Export CSV
CVE-2008-2315

python: Multiple integer overflows in python core

Multiple integer overflows in Python 2.5.2 and earlier allow context-dependent attackers to have an unknown impact via vectors related to the (1) stringobject, (2) unicodeobject, (3) bufferobject, (4) longobject, (5) tupleobject, (6) stropmodule, (7) gcmodule, and (8) mmapmodule modules. NOTE: The expandtabs integer overflows in stringobject and unicodeobject in 2.5.2 are covered by CVE-2008-5031.

CVSS 2.0 · 7.5 High EPSS 4.4% KEV · Not listed
Vendors
Python Redhat
Products
Python Enterprise Linux
CVE-2008-1887

python: PyString_FromStringAndSize does not check for negative size values

Python 2.5.2 and earlier allows context-dependent attackers to execute arbitrary code via multiple vectors that cause a negative size value to be provided to the PyString_FromStringAndSize function, which allocates less memory than expected when assert() is disabled and triggers a buffer overflow.

CVSS 2.0 · 9.3 Critical EPSS 6.3% KEV · Not listed
Vendors
Canonical Debian Python and 1 more
Products
Ubuntu Linux Debian Linux Python and 1 more
CVE-2008-1721

python: integer signedness error in the zlib extension module

Integer signedness error in the zlib extension module in Python 2.5.2 and earlier allows remote attackers to execute arbitrary code via a negative signed integer, which triggers insufficient memory allocation and a buffer overflow.

CVSS 2.0 · 7.5 High EPSS 22.6% KEV · Not listed
Vendors
Canonical Debian Python and 1 more
Products
Ubuntu Linux Debian Linux Python and 1 more
CVE-2006-4980

python repr unicode buffer overflow

Buffer overflow in the repr function in Python 2.3 through 2.6 before 20060822 allows context-dependent attackers to cause a denial of service and possibly execute arbitrary code via crafted wide character UTF-32/UCS-4 strings to certain scripts.

CVSS 2.0 · 7.5 High EPSS 5.6% KEV · Not listed
Vendors
Python Redhat
Products
Python Enterprise Linux Network Satellite
CVE-2008-1679

python: imageop module integer overflows

Multiple integer overflows in imageop.c in Python before 2.5.3 allow context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via crafted images that trigger heap-based buffer overflows. NOTE: this issue is due to an incomplete fix for CVE-2007-4965.

CVSS 2.0 · 6.8 Medium EPSS 4.1% KEV · Not listed
Vendors
Python Redhat
Products
Python Enterprise Linux
CVE-2007-2052

python off-by-one locale.strxfrm() (possible memory disclosure)

Off-by-one error in the PyLocale_strxfrm function in Modules/_localemodule.c for Python 2.4 and 2.5 causes an incorrect buffer size to be used for the strxfrm function, which allows context-dependent attackers to read portions of memory via unknown manipulations that trigger a buffer over-read due to missing null termination.

CVSS 2.0 · 5.0 Medium EPSS 14.1% KEV · Not listed
Vendors
Python Redhat
Products
Python Enterprise Linux Network Satellite
CVE-2007-4965

python imageop module heap corruption

Multiple integer overflows in the imageop module in Python 2.5.1 and earlier allow context-dependent attackers to cause a denial of service (application crash) and possibly obtain sensitive information (memory contents) via crafted arguments to (1) the tovideo method, and unspecified other vectors related to (2) imageop.c, (3) rbgimgmodule.c, and other files, which trigger heap-based buffer overflows.

CVSS 2.0 · 5.8 Medium EPSS 14.0% KEV · Not listed
Vendors
Python Redhat
Products
Python Enterprise Linux Network Satellite
CVE-2009-3720

expat: buffer over-read and crash on XML with malformed UTF-8 sequences

The updatePosition function in lib/xmltok_impl.c in libexpat in Expat 2.0.1, as used in Python, PyXML, w3c-libwww, and other software, allows context-dependent attackers to cause a denial of service (application crash) via an XML document with crafted UTF-8 sequences that trigger a buffer over-read, a different vulnerability than CVE-2009-2625.

CVSS 2.0 · 5.0 Medium EPSS 27.9% KEV · Not listed
Vendors
Apache Libexpat Project Python and 1 more
Products
Http Server Libexpat Python and 4 more
CVE-2025-1795

Mishandling of comma during folding and unicode-encoding of email headers

During an address list folding when a separating comma ends up on a folded line and that line is to be unicode-encoded then the separator itself is also unicode-encoded. Expected behavior is that the separating comma remains a plan comma. This can result in the address header being misinterpreted by some mail servers.

CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
Vendors
Python
Products
Cpython
CVE-2025-4517

Arbitrary writes via tarfile realpath overflow

Allows arbitrary filesystem writes outside the extraction directory during extraction with filter="data". You are affected by this vulnerability if using the tarfile module to extract untrusted tar archives using TarFile.extractall() or TarFile.extract() using the filter= parameter with a value of "data" or "tar". See the tarfile extraction filters documentation https://docs.python.org/3/library/tarfile.html#tarfile-extraction-filter  for more information. Note that for Python 3.14 or later the default value of filter= changed from "no filtering" to `"data", so if you are relying on this new default behavior then your usage is also affected. Note that none of these vulnerabilities significantly affect the installation of source distributions which are tar archives as source distributions already allow arbitrary code execution during the build process. However when evaluating source distributions it's important to avoid installing source distributions with suspicious links.

CVSS 3.1 · 9.4 Critical EPSS 1.5% KEV · Not listed
Vendors
Python Redhat
Products
Cpython Enterprise Linux Rhel Aus and 4 more
CVE-2025-4435

Tarfile extracts filtered members when errorlevel=0

When using a TarFile.errorlevel = 0 and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0 in affected versions is that the member would still be extracted and not skipped.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Python Redhat
Products
Cpython Enterprise Linux Rhel Aus and 4 more
CVE-2025-8291

ZIP64 End of Central Directory (EOCD) Locator record offset not checked

The 'zipfile' module would not check the validity of the ZIP64 End of Central Directory (EOCD) Locator record offset value would not be used to locate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be assumed to be the previous record in the ZIP archive. This could be abused to create ZIP archives that are handled differently by the 'zipfile' module compared to other ZIP implementations. Remediation maintains this behavior, but checks that the offset specified in the ZIP64 EOCD Locator record matches the expected value.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Python
Products
Cpython
CVE-2025-4516

Use-after-free in "unicode_escape" decoder with error handler

There is an issue in CPython when using `bytes.decode("unicode_escape", error="ignore|replace")`. If you are not using the "unicode_escape" encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.

CVSS 4.0 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Python
Products
Cpython
CVE-2026-3219

pip doesn't reject concatenated ZIP and tar archives

pip handles concatenated tar and ZIP files as ZIP files regardless of filename or whether a file is both a tar and ZIP file. This behavior could result in confusing installation behavior, such as installing "incorrect" files according to the filename of the archive. New behavior only proceeds with installation if the file identifies uniquely as a ZIP or tar archive, not as both.

CVSS 4.0 · 4.6 Medium EPSS < 1% KEV · Not listed
Vendors
Python
Products
Pip
CVE-2025-6069

HTMLParser quadratic complexity when processing malformed inputs

The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Python
Products
Cpython
CVE-2025-8194

Tarfile infinite loop during parsing with negative member offset

There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. This vulnerability can be mitigated by including the following patch after importing the “tarfile” module:  https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Python
Products
Cpython
CVE-2024-5642

Buffer overread when using an empty list with SSLContext.set_npn_protocols()

CPython 3.9 and earlier doesn't disallow configuring an empty list ("[]") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured).

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Python
Products
Cpython
CVE-2024-12718

Bypass extraction filter to modify file metadata outside extraction directory

Allows modifying some file metadata (e.g. last modified) with filter="data" or file permissions (chmod) with filter="tar" of files outside the extraction directory. You are affected by this vulnerability if using the tarfile module to extract untrusted tar archives using TarFile.extractall() or TarFile.extract() using the filter= parameter with a value of "data" or "tar". See the tarfile extraction filters documentation https://docs.python.org/3/library/tarfile.html#tarfile-extraction-filter  for more information. Only Python versions 3.12 or later are affected by these vulnerabilities, earlier versions don't include the extraction filter feature. Note that for Python 3.14 or later the default value of filter= changed from "no filtering" to `"data", so if you are relying on this new default behavior then your usage is also affected. Note that none of these vulnerabilities significantly affect the installation of source distributions which are tar archives as source distributions already allow arbitrary code execution during the build process. However when evaluating source distributions it's important to avoid installing source distributions with suspicious links.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Python Redhat
Products
Cpython Enterprise Linux Rhel Aus and 4 more
CVE-2026-1703

Limited path traversal when installing wheel archives

When pip is installing and extracting a maliciously crafted wheel archive, files may be extracted outside the installation directory. The path traversal is limited to prefixes of the installation directory, thus isn't able to inject or overwrite executable files in typical situations.

CVSS 4.0 · 2 Low EPSS < 1% KEV · Not listed
Vendors
Python
Products
Pip
CVE-2026-0865

wsgiref.headers.Headers allows header newline injection

User-controlled header names and values containing newlines can allow injecting HTTP headers.

CVSS 4.0 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Python
Products
Cpython