GHSA-674p-xv2x-rf3g json
Litestar has potential log injection in exception logging
published last yr. modified last yr.
- cvss
- 3.7
- version 3.1, GitHub
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- —
- no score, EPSS covers CVEs only
- public exploits
- 0
- none known
Summary
### Summary
Litestar does not escape url paths when logging exceptions. This makes logger vulnerable to CRLF injection if logging level is configured to debug or `log_exceptions` is set to "always", which allows attackers to inject newlines and forge log entries.
### Details
Litestar directly formats unquoted path into exception logs without validation or escaping when using default exception logging handler.
https://github.com/litestar-org/litestar/blob/1e0dc7c4d67151c836208a3e360051e983b5083a/litestar/logging/config.py#L145-L150
Attackers can inject newlines in logs by embedding`%0d%0a` in url path.
`log_exceptions="always"` is not enabled by default. However, it is set in the examples of documentation (https://github.com/litestar-org/litestar/blob/1e0dc7c4d67151c836208a3e360051e983b5083a/docs/usage/logging.rst#logging). User will be impacted if they directly copy the logging config from docs.
### PoC
``` curl "http://172.17.0.2:8000/%29%0D%0AINFO:%20%20%20%20%20127.0.0.1:8192%20-%20%22POST%20/login%20HTTP/1.1%22%20200%20OK%0D%0A%28" ```
logging:
``` 2025-07-15 00:00:00 - litestar - ERROR - Uncaught exception (connection_type=http, path=/) INFO: 127.0.0.1:8192 - "POST /login HTTP/1.1" 200 OK ... ```
If stacktracks for 404 are configured to be ignored (`disable_stack_trace={404},`), attacker may also exploit this by sending malformed requests to cause 400/500 exceptions and avoid 404 in endpoints with str path parameters.
Patch / fix
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Check with FencerCVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | litestar | <2.17.0 |
2.17.0 |
Classification
- Weakness
-
- CWE-117 Improper Output Neutralization for Logs
References
Sources
- GitHub Advisory GHSA-674p-xv2x-rf3g
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