CVE-2025-47273VulnerabilityPublished 13 Aug 2026Updated 26 Oct 2026

Pip tools: setuptools has a path traversal vulnerability in PackageIndex.download that leads to Arbitrary File Write

Affects pip-toolsSource GCVE Database

Public exploit available · CVSS 8.7 High : upgrade to 7.4.1_2 as a priority.

Data as of 26 Oct 2026, 19:32 UTC

CVSS 4.0 base score

8.7High

How severe the flaw is on the 0–10 CVSS scale.

Patch: Available – fixed in 7.4.1_2

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: None
Vulnerable system integrity: High
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the vulnerable system. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the vulnerable system.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 13 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade pip-tools to 7.4.1_2.

Affected software

Product	Affected	Fixed in
Homebrewpip-tools`pkg:brew/pip-tools`Other threats	Affected >=7.3.0_1 <7.4.1_2	Fixed in 7.4.1_2

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AI-suggested

A fix is available in pip-tools version 7.4.1_2. Users should upgrade to this version or later to remediate the vulnerability. Since the vulnerability is fixed in this release, no additional mitigation steps are required.

Description

A path traversal vulnerability in the setuptools PackageIndex.download function allows an attacker to write files to arbitrary filesystem locations with the permissions of the running process. This flaw arises from insufficient sanitization of URL-derived filenames used in os.path.join, enabling path traversal despite some replacement of '..' sequences. The vulnerability affects pip-tools versions >=7.3.0_1 and <7.4.1_2 and was fixed in version 7.4.1_2. Exploitation could lead to arbitrary file write and potentially remote code execution depending on context. The vulnerability has a high severity score (CVSS 8.7) and no known exploits in the wild have been reported. The risk is somewhat reduced due to deprecation of easy_install and package_index components.

Impact

Successful exploitation permits arbitrary file write on the filesystem with the privileges of the Python process running setuptools. This can lead to remote code execution depending on the environment and context. The vulnerability is rated high severity with a CVSS 4.0 score of 8.7, indicating network attack vector, low complexity, no privileges or user interaction required, but high impact on integrity via arbitrary file write.

Summary

CVE-2025-47273 is a path traversal vulnerability in setuptools' PackageIndex.download method used by pip-tools. The vulnerability stems from improper sanitization of filenames derived from URLs, which are passed to os.path.join with a temporary directory path. Because os.path.join discards the first argument if the second is an absolute path, an attacker can craft URLs that cause arbitrary file writes outside the intended directory. Although some sanitization replaces '..' with '.', this is insufficient to prevent traversal. This flaw allows an attacker to write files anywhere on the filesystem with the permissions of the Python process, potentially leading to remote code execution. The issue affects pip-tools versions from 7.3.0_1 up to but not including 7.4.1_2. The vulnerability was fixed in version 7.4.1_2. No active exploitation has been observed, and the attack surface is reduced due to deprecation of related components.

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Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 19:32 UTC

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