CVE-2026-8794
PaperCut NG/MF: User enumeration via timing attack
Description
PaperCut NG/MF contains an observable timing discrepancy in its authentication component. An unauthenticated remote attacker can exploit this vulnerability to perform username enumeration by measuring response times during login attempts. The system executes a password hash comparison only when a valid account is supplied, creating a measurable timing oracle that reveals account existence.
INFO
Published Date :
Aug. 3, 2026, 8:17 a.m.
Last Modified :
Aug. 3, 2026, 8:17 a.m.
Remotely Exploit :
Yes !
Source :
eb41dac7-0af8-4f84-9f6d-0272772514f4
Affected Products
The following products are affected by CVE-2026-8794
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | eb41dac7-0af8-4f84-9f6d-0272772514f4 | ||||
| CVSS 4.0 | MEDIUM | eb41dac7-0af8-4f84-9f6d-0272772514f4 |
Solution
- Update PaperCut NG/MF to the latest version.
- Apply vendor-provided security patches.
- Implement constant-time password comparison.
- Mitigate timing oracle vulnerabilities.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-8794.
| URL | Resource |
|---|---|
| https://www.papercut.com/kb/Main/papercut-ng-mf-security-bulletin-3-aug-2026/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-8794 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-8794
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-8794 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-8794 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by eb41dac7-0af8-4f84-9f6d-0272772514f4
Aug. 03, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'PaperCut', 'product': 'PaperCut NG/MF', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '26.0.3', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description PaperCut NG/MF contains an observable timing discrepancy in its authentication component. An unauthenticated remote attacker can exploit this vulnerability to perform username enumeration by measuring response times during login attempts. The system executes a password hash comparison only when a valid account is supplied, creating a measurable timing oracle that reveals account existence. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-208 Added Reference https://www.papercut.com/kb/Main/papercut-ng-mf-security-bulletin-3-aug-2026/