AIOHTTP has unicode match groups in regexes for ASCII protocol elements
Published Jan 5, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
AIOHTTP has unicode match groups in regexes for ASCII protocol elements
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
The parser allows non-ASCII decimals to be present in the Range header.
Potential impact
There is no known impact, but there is the possibility that there's a method to exploit a request smuggling vulnerability. ---- Patch: https://github.com/aio-libs/aiohttp/commit/c7b7a044f88c71cefda95ec75cdcfaa4792b3b96
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
Record history
Published Jan 5, 2026 · Last refreshed Nov 3, 2026