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39 vulnerabilities by Python Software Foundation
CVE-2026-1299 (GCVE-0-2026-1299)
Vulnerability from cvelistv5 – Published: 2026-01-23 16:27 – Updated: 2026-01-26 14:20
VLAI?
Title
email BytesGenerator header injection due to unquoted newlines
Summary
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".
Severity ?
CWE
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.15.0
(python)
|
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CVE-2025-12781 (GCVE-0-2025-12781)
Vulnerability from cvelistv5 – Published: 2026-01-21 19:34 – Updated: 2026-01-22 20:12
VLAI?
Title
base64.b64decode() always accepts "+/" characters, despite setting altchars
Summary
When passing data to the b64decode(), standard_b64decode(), and urlsafe_b64decode() functions in the "base64" module the characters "+/" will always be accepted, regardless of the value of "altchars" parameter, typically used to establish an "alternative base64 alphabet" such as the URL safe alphabet. This behavior matches what is recommended in earlier base64 RFCs, but newer RFCs now recommend either dropping characters outside the specified base64 alphabet or raising an error. The old behavior has the possibility of causing data integrity issues.
This behavior can only be insecure if your application uses an alternate base64 alphabet (without "+/"). If your application does not use the "altchars" parameter or the urlsafe_b64decode() function, then your application does not use an alternative base64 alphabet.
The attached patches DOES NOT make the base64-decode behavior raise an error, as this would be a change in behavior and break existing programs. Instead, the patch deprecates the behavior which will be replaced with the newly recommended behavior in a future version of Python. Users are recommended to mitigate by verifying user-controlled inputs match the base64
alphabet they are expecting or verify that their application would not be
affected if the b64decode() functions accepted "+" or "/" outside of altchars.
Severity ?
CWE
- CWE-704 - Incorrect Type Conversion or Cast
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.13.10
(python)
Affected: 3.14.0 , < 3.14.1 (python) Affected: 3.15.0a1 , < 3.15.0a2 (python) |
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CVE-2026-0672 (GCVE-0-2026-0672)
Vulnerability from cvelistv5 – Published: 2026-01-20 21:52 – Updated: 2026-01-26 14:20
VLAI?
Title
Header injection in http.cookies.Morsel
Summary
When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.
Severity ?
CWE
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.15.0
(python)
|
Credits
Omar M. Hasan
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CVE-2025-15367 (GCVE-0-2025-15367)
Vulnerability from cvelistv5 – Published: 2026-01-20 21:47 – Updated: 2026-01-22 04:55
VLAI?
Title
POP3 command injection in user-controlled commands
Summary
The poplib module, when passed a user-controlled command, can have
additional commands injected using newlines. Mitigation rejects commands
containing control characters.
Severity ?
CWE
- CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
Assigner
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.15.0
(python)
|
Credits
Omar M. Hasan
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CVE-2025-15366 (GCVE-0-2025-15366)
Vulnerability from cvelistv5 – Published: 2026-01-20 21:40 – Updated: 2026-01-22 04:55
VLAI?
Title
IMAP command injection in user-controlled commands
Summary
The imaplib module, when passed a user-controlled command, can have additional commands injected using newlines. Mitigation rejects commands containing control characters.
Severity ?
CWE
- CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
Assigner
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.15.0
(python)
|
Credits
Omar M. Hasan
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CVE-2025-15282 (GCVE-0-2025-15282)
Vulnerability from cvelistv5 – Published: 2026-01-20 21:35 – Updated: 2026-01-26 14:18
VLAI?
Title
Header injection via newlines in data URL mediatype
Summary
User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
Severity ?
CWE
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.15.0
(python)
|
Credits
Omar M. Hasan
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CVE-2026-0865 (GCVE-0-2026-0865)
Vulnerability from cvelistv5 – Published: 2026-01-20 21:26 – Updated: 2026-01-21 16:14
VLAI?
Title
wsgiref.headers.Headers allows header newline injection
Summary
User-controlled header names and values containing newlines can allow injecting HTTP headers.
Severity ?
CWE
- CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.15.0
(python)
|
Credits
Omar M. Hasan
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CVE-2025-11468 (GCVE-0-2025-11468)
Vulnerability from cvelistv5 – Published: 2026-01-20 21:09 – Updated: 2026-01-26 14:18
VLAI?
Title
Folding email comments of unfoldable characters doesn't preserve parenthesis
Summary
When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized.
Severity ?
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.15.0
(python)
|
Credits
Denis Ledoux
Seth Larson
Denis Ledoux
R. David Murray
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CVE-2025-12084 (GCVE-0-2025-12084)
Vulnerability from cvelistv5 – Published: 2025-12-03 18:55 – Updated: 2026-01-26 14:18
VLAI?
Title
Quadratic complexity in node ID cache clearing
Summary
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Severity ?
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.13.11
(python)
Affected: 3.14.0 , < 3.14.2 (python) Affected: 3.15.0a1 , < 3.15.0a3 (python) |
Credits
Jacob Walls
Shai Berger
Natalia Bidart
Seth Larson
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CVE-2025-13837 (GCVE-0-2025-13837)
Vulnerability from cvelistv5 – Published: 2025-12-01 18:13 – Updated: 2026-01-07 15:16
VLAI?
Title
Out-of-memory when loading Plist
Summary
When loading a plist file, the plistlib module reads data in size specified by the file itself, meaning a malicious file can cause OOM and DoS issues
Severity ?
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.13.10
(python)
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CVE-2025-13836 (GCVE-0-2025-13836)
Vulnerability from cvelistv5 – Published: 2025-12-01 18:02 – Updated: 2026-01-26 14:18
VLAI?
Title
Excessive read buffering DoS in http.client
Summary
When reading an HTTP response from a server, if no read amount is specified, the default behavior will be to use Content-Length. This allows a malicious server to cause the client to read large amounts of data into memory, potentially causing OOM or other DoS.
Severity ?
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.13.11
(python)
Affected: 3.14.0 , < 3.14.1 (python) Affected: 3.15.0a1 , < 3.15.0a3 (python) |
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CVE-2025-6075 (GCVE-0-2025-6075)
Vulnerability from cvelistv5 – Published: 2025-10-31 16:41 – Updated: 2025-12-02 17:43
VLAI?
Title
Quadratic complexity in os.path.expandvars() with user-controlled template
Summary
If the value passed to os.path.expandvars() is user-controlled a
performance degradation is possible when expanding environment
variables.
Severity ?
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.13.10
(python)
Affected: 3.14.0 , < 3.14.1 (python) Affected: 3.15.0a1 , < 3.15.0a2 (python) |
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CVE-2025-8291 (GCVE-0-2025-8291)
Vulnerability from cvelistv5 – Published: 2025-10-07 18:10 – Updated: 2025-12-02 17:43
VLAI?
Title
ZIP64 End of Central Directory (EOCD) Locator record offset not checked
Summary
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
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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.
Severity ?
4.3 (Medium)
CWE
- CWE-1285 - Improper Validation of Specified Index, Position, or Offset in Input
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.24
(python)
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Credits
Caleb Brown (Google)
Serhiy Storchaka
Seth Larson
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CVE-2025-8194 (GCVE-0-2025-8194)
Vulnerability from cvelistv5 – Published: 2025-07-28 18:42 – Updated: 2025-11-04 22:06
VLAI?
Title
Tarfile infinite loop during parsing with negative member offset
Summary
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
Severity ?
7.5 (High)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.24
(python)
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Credits
Alexander Urieles
Seth Larson
Ethan Furman
Steve Dower
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CVE-2025-6069 (GCVE-0-2025-6069)
Vulnerability from cvelistv5 – Published: 2025-06-17 13:39 – Updated: 2025-10-09 18:37
VLAI?
Title
HTMLParser quadratic complexity when processing malformed inputs
Summary
The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.
Severity ?
4.3 (Medium)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.24
(python)
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Credits
Serhiy Storchaka
Jake Howard
sw0rd1ight
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CVE-2024-12718 (GCVE-0-2024-12718)
Vulnerability from cvelistv5 – Published: 2025-06-03 12:59 – Updated: 2025-07-24 15:57
VLAI?
Title
Bypass extraction filter to modify file metadata outside extraction directory
Summary
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.
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Severity ?
5.3 (Medium)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.23
(python)
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Credits
Jakub Wilk
Seth Larson
Petr Viktorin
Serhiy Storchaka
Hugo van Kemenade
Łukasz Langa
Thomas Wouters
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CVE-2025-4435 (GCVE-0-2025-4435)
Vulnerability from cvelistv5 – Published: 2025-06-03 12:59 – Updated: 2025-07-07 17:36
VLAI?
Title
Tarfile extracts filtered members when errorlevel=0
Summary
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.
Severity ?
7.5 (High)
CWE
- CWE-682 - Incorrect Calculation
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.23
(python)
Affected: 3.10.0 , < 3.10.18 (python) Affected: 3.11.0 , < 3.11.13 (python) Affected: 3.12.0 , < 3.12.11 (python) Affected: 3.13.0 , < 3.13.4 (python) Affected: 3.14.0a1 , < 3.14.0b3 (python) |
Credits
Chuck Woodraska
Petr Viktorin
Serhiy Storchaka
Hugo van Kemenade
Łukasz Langa
Thomas Wouters
Seth Larson
Matt Prodani
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CVE-2025-4138 (GCVE-0-2025-4138)
Vulnerability from cvelistv5 – Published: 2025-06-03 12:59 – Updated: 2025-07-07 17:36
VLAI?
Title
Bypassing extraction filter to create symlinks to arbitrary targets outside extraction directory
Summary
Allows the extraction filter to be ignored, allowing symlink targets to point outside the destination directory, and the modification of some file metadata.
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.
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Severity ?
7.5 (High)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.23
(python)
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Credits
Caleb Brown (Google)
Petr Viktorin
Serhiy Storchaka
Hugo van Kemenade
Łukasz Langa
Thomas Wouters
Seth Larson
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CVE-2025-4330 (GCVE-0-2025-4330)
Vulnerability from cvelistv5 – Published: 2025-06-03 12:58 – Updated: 2025-07-07 17:36
VLAI?
Title
Extraction filter bypass for linking outside extraction directory
Summary
Allows the extraction filter to be ignored, allowing symlink targets to point outside the destination directory, and the modification of some file metadata.
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.
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Severity ?
7.5 (High)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.23
(python)
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Credits
Caleb Brown (Google)
Petr Viktorin
Serhiy Storchaka
Hugo van Kemenade
Łukasz Langa
Thomas Wouters
Seth Larson
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CVE-2025-4517 (GCVE-0-2025-4517)
Vulnerability from cvelistv5 – Published: 2025-06-03 12:58 – Updated: 2025-10-24 03:55
VLAI?
Title
Arbitrary writes via tarfile realpath overflow
Summary
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.
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Severity ?
9.4 (Critical)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.23
(python)
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Credits
Caleb Brown (Google)
Petr Viktorin
Serhiy Storchaka
Hugo van Kemenade
Łukasz Langa
Thomas Wouters
Seth Larson
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CVE-2025-4516 (GCVE-0-2025-4516)
Vulnerability from cvelistv5 – Published: 2025-05-15 13:29 – Updated: 2025-06-03 20:53
VLAI?
Title
Use-after-free in "unicode_escape" decoder with error handler
Summary
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.
Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||
Impacted products
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|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.23
(python)
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CVE-2025-1795 (GCVE-0-2025-1795)
Vulnerability from cvelistv5 – Published: 2025-02-28 18:59 – Updated: 2025-12-01 19:01
VLAI?
Title
Mishandling of comma during folding and unicode-encoding of email headers
Summary
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.
Severity ?
CWE
- CWE-116 - Improper Encoding or Escaping of Output
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.23
(python)
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CVE-2024-3220 (GCVE-0-2024-3220)
Vulnerability from cvelistv5 – Published: 2025-02-14 16:18 – Updated: 2025-03-14 10:03
VLAI?
Title
Default mimetype known files writeable on Windows
Summary
There is a defect in the CPython standard library module “mimetypes” where on Windows the default list of known file locations are writable meaning other users can create invalid files to cause MemoryError to be raised on Python runtime startup or have file extensions be interpreted as the incorrect file type.
This defect is caused by the default locations of Linux and macOS platforms (such as “/etc/mime.types”) also being used on Windows, where they are user-writable locations (“C:\etc\mime.types”).
To work-around this issue a user can call mimetypes.init() with an empty list (“[]”) on Windows platforms to avoid using the default list of known file locations.
Severity ?
CWE
- CWE-426 - Untrusted Search Path
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.14.0
(python)
|
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CVE-2025-0938 (GCVE-0-2025-0938)
Vulnerability from cvelistv5 – Published: 2025-01-31 17:51 – Updated: 2025-11-03 20:56
VLAI?
Title
URL parser allowed square brackets in domain names
Summary
The Python standard library functions `urllib.parse.urlsplit` and `urlparse` accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.
Severity ?
CWE
- CWE-20 - Improper Input Validation
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.22
(python)
Affected: 3.10.0 , < 3.10.17 (python) Affected: 3.11.0 , < 3.11.12 (python) Affected: 3.12.0 , < 3.12.9 (python) Affected: 3.13.0 , < 3.13.2 (python) Affected: 3.14.0a1 , < 3.14.0a5 (python) |
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CVE-2024-12254 (GCVE-0-2024-12254)
Vulnerability from cvelistv5 – Published: 2024-12-06 15:19 – Updated: 2025-04-04 23:03
VLAI?
Title
Unbounded memory buffering in SelectorSocketTransport.writelines()
Summary
Starting in Python 3.12.0, the asyncio._SelectorSocketTransport.writelines()
method would not "pause" writing and signal to the Protocol to drain
the buffer to the wire once the write buffer reached the "high-water
mark". Because of this, Protocols would not periodically drain the write
buffer potentially leading to memory exhaustion.
This
vulnerability likely impacts a small number of users, you must be using
Python 3.12.0 or later, on macOS or Linux, using the asyncio module
with protocols, and using .writelines() method which had new
zero-copy-on-write behavior in Python 3.12.0 and later. If not all of
these factors are true then your usage of Python is unaffected.
Severity ?
CWE
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
3.12.0 , < 3.12.9
(python)
Affected: 3.13.0 , < 3.13.2 (python) Affected: 3.14.0a1 , < 3.14.0a3 (python) |
Credits
J. Nick Koston
Seth Larson
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CVE-2024-11168 (GCVE-0-2024-11168)
Vulnerability from cvelistv5 – Published: 2024-11-12 21:22 – Updated: 2025-11-03 21:51
VLAI?
Title
Improper validation of IPv6 and IPvFuture addresses
Summary
The urllib.parse.urlsplit() and urlparse() functions improperly validated bracketed hosts (`[]`), allowing hosts that weren't IPv6 or IPvFuture. This behavior was not conformant to RFC 3986 and potentially enabled SSRF if a URL is processed by more than one URL parser.
Severity ?
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.21
(python)
Affected: 3.10.0 , < 3.10.16 (python) Affected: 3.11.0 , < 3.11.4 (python) Affected: 3.12.0a1 , < 3.12.0b1 (python) |
Credits
zer0yu (IPASSLab && ZGC Lab)
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CVE-2024-9287 (GCVE-0-2024-9287)
Vulnerability from cvelistv5 – Published: 2024-10-22 16:34 – Updated: 2025-11-03 22:33
VLAI?
Title
Virtual environment (venv) activation scripts don't quote paths
Summary
A vulnerability has been found in the CPython `venv` module and CLI where path names provided when creating a virtual environment were not quoted properly, allowing the creator to inject commands into virtual environment "activation" scripts (ie "source venv/bin/activate"). This means that attacker-controlled virtual environments are able to run commands when the virtual environment is activated. Virtual environments which are not created by an attacker or which aren't activated before being used (ie "./venv/bin/python") are not affected.
Severity ?
CWE
- CWE-428 - Unquoted Search Path or Element
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.21
(python)
Affected: 3.10.0 , < 3.10.16 (python) Affected: 3.11.0 , < 3.11.11 (python) Affected: 3.12.0 , < 3.12.8 (python) Affected: 3.13.0 , < 3.13.1 (python) Affected: 3.14.0a1 , < 3.14.0a2 (python) |
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CVE-2024-6232 (GCVE-0-2024-6232)
Vulnerability from cvelistv5 – Published: 2024-09-03 12:29 – Updated: 2025-11-03 22:32
VLAI?
Title
Regular-expression DoS when parsing TarFile headers
Summary
There is a MEDIUM severity vulnerability affecting CPython.
Regular expressions that allowed excessive backtracking during tarfile.TarFile header parsing are vulnerable to ReDoS via specifically-crafted tar archives.
Severity ?
7.5 (High)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
Affected: 3.9.0 , < 3.9.20 (python) Affected: 3.10.0 , < 3.10.15 (python) Affected: 3.11.0 , < 3.11.10 (python) Affected: 3.12.0 , < 3.12.6 (python) Affected: 3.13.0a1 , < 3.13.0rc2 (python) |
Credits
Elias Joakim Myllymäki
Seth Larson
Seth Larson
Gregory P. Smith
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CVE-2024-8088 (GCVE-0-2024-8088)
Vulnerability from cvelistv5 – Published: 2024-08-22 18:45 – Updated: 2025-11-03 22:32
VLAI?
Title
Infinite loop when iterating over zip archive entry names from zipfile.Path
Summary
There is a HIGH severity vulnerability affecting the CPython "zipfile"
module affecting "zipfile.Path". Note that the more common API "zipfile.ZipFile" class is unaffected.
When iterating over names of entries in a zip archive (for example, methods
of "zipfile.Path" like "namelist()", "iterdir()", etc)
the process can be put into an infinite loop with a maliciously crafted
zip archive. This defect applies when reading only metadata or extracting
the contents of the zip archive. Programs that are not handling
user-controlled zip archives are not affected.
Severity ?
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
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Credits
Jason R. Coombs
Seth Larson
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CVE-2024-7592 (GCVE-0-2024-7592)
Vulnerability from cvelistv5 – Published: 2024-08-19 19:06 – Updated: 2025-11-03 22:32
VLAI?
Title
Quadratic complexity parsing cookies with backslashes
Summary
There is a LOW severity vulnerability affecting CPython, specifically the
'http.cookies' standard library module.
When parsing cookies that contained backslashes for quoted characters in
the cookie value, the parser would use an algorithm with quadratic
complexity, resulting in excess CPU resources being used while parsing the
value.
Severity ?
7.5 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
Affected: 3.9.0 , < 3.9.20 (python) Affected: 3.10.0 , < 3.10.15 (python) Affected: 3.11.0 , < 3.11.10 (python) Affected: 3.12.0 , < 3.12.6 (python) Affected: 3.13.0a1 , < 3.13.0rc2 (python) |
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