specially crafted Unicode input containing long runs of combining characters
with alternating Canonical Combining Class values.
This affects all normalization forms.
Analysis and contextual insights are available on OpenCVE Cloud.
No solution or workaround provided in the CVE record.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-4827-1 | python3.11 security update |
Ubuntu USN |
USN-8509-1 | Python vulnerabilities |
Tue, 11 Aug 2026 02:45:00 +0200
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
Wed, 05 Aug 2026 03:00:00 +0200
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
Tue, 16 Jun 2026 17:00:00 +0200
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
Fri, 05 Jun 2026 12:45:00 +0200
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Python
Python cpython |
|
| Vendors & Products |
Python
Python cpython |
Thu, 04 Jun 2026 19:45:00 +0200
Thu, 04 Jun 2026 02:15:00 +0200
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-606 | |
| References |
| |
| Metrics |
threat_severity
|
cvssV3_1
|
Wed, 03 Jun 2026 22:30:00 +0200
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
Wed, 03 Jun 2026 20:30:00 +0200
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Wed, 03 Jun 2026 18:00:00 +0200
| Type | Values Removed | Values Added |
|---|---|---|
| Description | unicodedata.normalize() can take excessive CPU time when processing specially crafted Unicode input containing long runs of combining characters with alternating Canonical Combining Class values. This affects all normalization forms. | |
| Title | Potential DoS via quadratic complexity in unicodedata.normalize() | |
| Weaknesses | CWE-407 | |
| References |
| |
| Metrics |
cvssV4_0
|
Status: PUBLISHED
Assigner: PSF
Published:
Updated: 2026-08-13T00:28:05.768Z
Reserved: 2026-02-26T15:19:46.862Z
Link: CVE-2026-3276
Updated: 2026-06-03T19:18:17.828Z
Status : Awaiting Analysis
Published: 2026-06-03T16:16:29.253
Modified: 2026-08-13T01:16:52.847
Link: CVE-2026-3276
OpenCVE Enrichment
Updated: 2026-06-05T12:11:33Z
Debian DLA
Ubuntu USN