Advisory details:
pypa / pyload-ng/PYSEC-2026-1818
| Advisory ID | pypa/pyload-ng/PYSEC-2026-1818 |
| Aliases |
CVE-2024-21645
GHSA-ghmw-rwh8-6qmr PYSEC-2026-1818 |
| Summary | pyload Log Injection vulnerability ### Summary A log injection vulnerability was identified in `pyload`. This vulnerability allows any unauthenticated actor to inject arbitrary messages into the logs gathered by `pyload`. ### Details `pyload` will generate a log entry when attempting to sign in with faulty credentials. This entry will be in the form of `Login failed for user 'USERNAME'`. However, when supplied with a username containing a newline, this newline is not properly escaped. Newlines are also the delimiter between log entries. This allows the attacker to inject new log entries into the log file. ### PoC Run `pyload` in the default configuration by running the following command ``` pyload ``` We can now sign in as the pyload user and view the logs at `http://localhost:8000/logs`.  Any unauthenticated attacker can now make the following request to inject arbitrary logs. ``` curl 'http://localhost:8000/login?next=http://localhost:8000/' -X POST -H 'Content-Type: application/x-www-form-urlencoded' --data-raw $'do=login&username=wrong\'%0a[2024-01-05 02:49:19] HACKER PinkDraconian THIS ENTRY HAS BEEN INJECTED&password=wrong&submit=Login' ``` If we now were to look at the logs again, we see that the entry has successfully been injected.  ### Impact Forged or otherwise, corrupted log files can be used to cover an attacker’s tracks or even to implicate another party in the commission of a malicious act. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 4.8 |
| Risk | 2.4 |
| 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 | 5.3 | https://github.com/pypa/advisory-database/blob/main/vulns/pyload-ng/PYSEC-2026-1818.yaml |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/pyload/pyload | ||
| https://github.com/pyload/pyload/commit/4159a1191ec4fe6d927e57a9c4bb8f54e16c381d | ||
| https://pypi.org/project/pyload-ng | ||
| CVE-2024-21645 | https://nvd.nist.gov/vuln/detail/CVE-2024-21645 | |
| GHSA-ghmw-rwh8-6qmr | https://github.com/advisories/GHSA-ghmw-rwh8-6qmr | |
| GHSA-ghmw-rwh8-6qmr | https://github.com/pyload/pyload/security/advisories/GHSA-ghmw-rwh8-6qmr |
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 |
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2024-01-17T21:13:17Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2024/21xxx/CVE-2024-21645.json
Source Advisory: vulnrichment/CVE-2024-21645
[{'Exploitation': 'poc'},
{'Automatable': 'yes'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]