CVE-2019-10160
CriticalCVSS 9.8Exploitation Probability (EPSS)
Very high risk92th percentile - higher than 92% of all known CVEs
Summary
A security regression of CVE-2019-9636 was discovered in Python since commit d537ab0ff9767ef024f26246899728f0116b1ec3 affecting versions 2.7, 3.5, 3.6, 3.7 and from v3.8.0a4 through v3.8.0b1. An attacker can still exploit CVE-2019-9636 by abusing the user and password parts of a URL. When an application parses user-supplied URLs to store cookies, authentication credentials, or other information, it is possible for an attacker to provide specially crafted URLs to make the application send host-related information to a different host than intended.
Risk Assessment
Risk of leaking cookies and authentication data to incorrect hosts, potentially leading to session theft or credential compromise.
Recommendation
Upgrade Python to version 2.7.17, 3.5.10, 3.6.10, 3.7.3 or later, and if using 3.8, upgrade to 3.8.0b2 or later.
Other vulnerabilities in Python
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A flaw was found in Python's urllib.parse module where the urlparse method does not sanitize input, allowing characters like ' ' and ' ' in the URL path. This can lead to CRLF injection attacks.
- CVE-2026-1299Medium
The email module in Python, specifically the BytesGenerator class, improperly quotes newlines in email headers during serialization, allowing header injection. This only affects usage of LiteralHeader that does not respect email folding.
- CVE-2022-42919High
A vulnerability in Python 3.9.x before 3.9.16 and 3.10.x before 3.10.9 on Linux allows local privilege escalation in a non-default configuration. The multiprocessing library with the forkserver start method permits pickle deserialization from any user on the same local network of the machine.
- CVE-2023-27043Medium
The email module in Python through 3.11.3 incorrectly parses email addresses containing special characters. The wrong portion of an RFC2822 header is identified as the value of the addr-spec.
- CVE-2020-10735High
A flaw was found in Python. In algorithms with quadratic time complexity using non-binary bases, when using int("text"), a system could take 50ms to parse an int string with 100,000 digits and 5s for 1,000,000 digits (float, decimal, int.from_bytes(), and int() for binary bases 2, 4, 8, 16, and 32 are not affected). The highest threat from this vulnerability is to system availability.
- CVE-2019-20907High
In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.
- CVE-2019-5010High
Vulnerability in the X509 certificate parser of Python 2.7.11 and 3.6.6 allows denial of service via a specially crafted X509 certificate causing a NULL pointer dereference.
- CVE-2019-16056High
An issue was discovered in Python through 2.7.16, 3.x through 3.5.7, 3.6.x through 3.6.9, and 3.7.x through 3.7.4. The email module wrongly parses email addresses that contain multiple @ characters. An application that uses the email module and implements some kind of checks on the From/To headers of a message could be tricked into accepting an email address that should be denied. An attack may be the same as in CVE-2019-11340; however, this CVE applies to Python more generally.
Original NVD description (English source)
A security regression of CVE-2019-9636 was discovered in python since commit d537ab0ff9767ef024f26246899728f0116b1ec3 affecting versions 2.7, 3.5, 3.6, 3.7 and from v3.8.0a4 through v3.8.0b1, which still allows an attacker to exploit CVE-2019-9636 by abusing the user and password parts of a URL. When an application parses user-supplied URLs to store cookies, authentication credentials, or other kind of information, it is possible for an attacker to provide specially crafted URLs to make the application locate host-related information (e.g. cookies, authentication data) and send them to a different host than where it should, unlike if the URLs had been correctly parsed. The result of an attack may vary based on the application.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

