VulnerabilityPublished 11 Mar 2026

CVE-2026-32108: 9001 copyparty · Incorrect Authorization

Affects 9001 copypartySource CVE Database V5

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Mentioned vulnerabilities

CVE-2025-58753

Not known to be exploited · CVSS 2.3 Low : upgrade to 1.20.12 when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 4.0 base score

2.3Low

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 1.20.12

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

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

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: Present: The successful attack depends on the presence of specific deployment and execution conditions of the vulnerable system that enable the attack. These include: a race condition must be won to successfully exploit the vulnerability (the successfulness of the attack is conditioned on execution conditions that are not under full control of the attacker, or the attack may need to be launched multiple times against a single target before being successful); the attacker must inject themselves into the logical network path between the target and the resource requested by the victim (e.g. vulnerabilities requiring an on-path attacker).
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within 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.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 11 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
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), the Metasploit, Exploit-DB and nuclei-templates index as of 29 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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 copyparty and 9001/copyparty to 1.20.12.

Affected software

Product	Affected	Fixed in
9001copyparty	Affected <1.20.12	Fixed in 1.20.12
GitHub9001/copyparty`pkg:github/9001/copyparty`Other threats	Affected <1.20.12	Fixed in 1.20.12

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

To mitigate CVE-2026-32108, organizations should immediately upgrade copyparty to version 1.20.12 or later, where the missing permission checks have been implemented. If upgrading is not immediately feasible, administrators should disable the shares feature or avoid sharing single files within folders when using FTP or SFTP servers. Restrict FTP and SFTP access to trusted networks or authenticated users only, and avoid making these services publicly accessible. Implement strong filename policies and monitoring to detect brute force or enumeration attempts on shared folders. Additionally, consider disabling FTP/SFTP if HTTP/HTTPS sharing suffices, as the vulnerability does not affect those protocols post prior fixes. Regularly audit shared folder configurations and access logs to identify unauthorized access attempts. Employ network segmentation and firewall rules to limit exposure of copyparty servers to untrusted networks.

Description

CVE-2026-32108 is an authorization vulnerability in copyparty versions prior to 1.20.12 affecting the shares feature when used with FTP or SFTP servers made publicly accessible. It allows an authenticated user browsing a shared single file via FTP/SFTP to guess or brute force sibling filenames in the same folder and gain unauthorized read access to those files. This vulnerability does not permit access to subdirectories and only applies under specific configurations involving the shares feature and FTP/SFTP protocols. It is similar to a previously fixed HTTP/HTTPS vulnerability but was not addressed for FTP until this fix. The CVSS score is low (2.3), reflecting limited impact and exploitation complexity. No known exploits are reported in the wild. The issue is fixed in copyparty version 1.

Impact

The primary impact of CVE-2026-32108 is unauthorized disclosure of files within a shared folder on copyparty servers configured with FTP or SFTP and publicly accessible shares of single files. Attackers with authenticated access to a shared file can enumerate and read sibling files by guessing filenames, potentially exposing sensitive or confidential information. However, the inability to access subdirectories limits the scope of data exposure. Since exploitation requires the shares feature to be used in a specific way and FTP/SFTP to be publicly accessible, the attack surface is relatively narrow. Organizations using copyparty for public file sharing over FTP/SFTP may face data leakage risks if they have not updated to version 1.20.12. The vulnerability does not allow modification or deletion of files, nor does it affect availability, so integrity and availability impacts are minimal. Overall, the risk is low but could be significant if sensitive files are exposed in shared folders accessible via FTP/SFTP.

CWE-863Incorrect Authorization (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #17OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
Architecture and Design
Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries.
Architecture and Design
Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V13.4.2 (opens in a new tab)
V7.2.2 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

github.com/9001/copyparty/security/advisories/GHSA-67rw-2x62-mqqm (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 19 Mar 2026, 02:22 UTC

WeaknessesCWE-863

Technical details

References

Community reviews

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