Advisory details:
pypa / octoprint/PYSEC-2026-1716
| Advisory ID | pypa/octoprint/PYSEC-2026-1716 |
| Aliases |
CVE-2026-23892
GHSA-xg4x-w2j3-57h6 PYSEC-2026-1716 |
| Summary | OctoPrint has Timing Side-Channel Vulnerability in API Key Authentication ### Impact OctoPrint versions up to and including 1.11.5 are affected by a (theoretical) timing attack vulnerability that allows API key extraction over the network. Due to using character based comparison that short-circuits on the first mismatched character during API key validation, rather than a cryptographical method with static runtime regardless of the point of mismatch, an attacker with network based access to an affected OctoPrint could extract API keys valid on the instance by measuring the response times of the denied access responses and guess an API key character by character. ### Patches The vulnerability will be patched in version 1.11.6. ### Workaround The likelihood of this attack actually working is highly dependent on the network's latency, noise and similar parameters. An actual proof of concept was not achieved so far. Still, as always administrators are advised to not expose their OctoPrint instance on hostile networks, especially not on the public Internet! ### Credits This vulnerability was discovered and responsibly disclosed to OctoPrint by [Knox Liu](https://github.com/yueyueL). |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 5.4 |
| Risk | 2.7 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| There are no known CWE. |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 5.9 | https://github.com/pypa/advisory-database/blob/main/vulns/octoprint/PYSEC-2026-1716.yaml |
| cvssv4 | 6.0 | https://github.com/pypa/advisory-database/blob/main/vulns/octoprint/PYSEC-2026-1716.yaml |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-01-27T19:13:25Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/23xxx/CVE-2026-23892.json
Source Advisory: vulnrichment/CVE-2026-23892
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]