Lookup for vulnerabilities affecting packages.
| Vulnerability_id | VCID-366w-k4rs-v7d3 |
| Summary | path-to-regexp vulnerable to Regular Expression Denial of Service via multiple wildcards
### Impact
When using multiple wildcards, combined with at least one parameter, a regular expression can be generated that is vulnerable to ReDoS. This backtracking vulnerability requires the second wildcard to be somewhere other than the end of the path.
**Unsafe examples:**
```
/*foo-*bar-:baz
/*a-:b-*c-:d
/x/*a-:b/*c/y
```
**Safe examples:**
```
/*foo-:bar
/*foo-:bar-*baz
```
### Patches
Upgrade to version `8.4.0`.
### Workarounds
If developers are using multiple wildcard parameters, they can check the regex output with a tool such as https://makenowjust-labs.github.io/recheck/playground/ to confirm whether a path is vulnerable. |
| Aliases |
| 0 |
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| 1 |
| alias |
GHSA-27v5-c462-wpq7 |
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| Fixed_packages |
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| Affected_packages |
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| References |
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| 1 |
| reference_url |
https://api.first.org/data/v1/epss?cve=CVE-2026-4923 |
| reference_id |
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| reference_type |
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| scores |
| 0 |
| value |
0.00052 |
| scoring_system |
epss |
| scoring_elements |
0.16406 |
| published_at |
2026-04-21T12:55:00Z |
|
| 1 |
| value |
0.00052 |
| scoring_system |
epss |
| scoring_elements |
0.16368 |
| published_at |
2026-04-18T12:55:00Z |
|
| 2 |
| value |
0.00052 |
| scoring_system |
epss |
| scoring_elements |
0.16348 |
| published_at |
2026-04-16T12:55:00Z |
|
| 3 |
| value |
0.00052 |
| scoring_system |
epss |
| scoring_elements |
0.16408 |
| published_at |
2026-04-13T12:55:00Z |
|
| 4 |
| value |
0.00052 |
| scoring_system |
epss |
| scoring_elements |
0.16468 |
| published_at |
2026-04-12T12:55:00Z |
|
| 5 |
| value |
0.00052 |
| scoring_system |
epss |
| scoring_elements |
0.16506 |
| published_at |
2026-04-11T12:55:00Z |
|
| 6 |
| value |
0.00052 |
| scoring_system |
epss |
| scoring_elements |
0.16524 |
| published_at |
2026-04-09T12:55:00Z |
|
| 7 |
| value |
0.00052 |
| scoring_system |
epss |
| scoring_elements |
0.16464 |
| published_at |
2026-04-08T12:55:00Z |
|
| 8 |
| value |
0.00052 |
| scoring_system |
epss |
| scoring_elements |
0.16379 |
| published_at |
2026-04-07T12:55:00Z |
|
| 9 |
| value |
0.00052 |
| scoring_system |
epss |
| scoring_elements |
0.16517 |
| published_at |
2026-04-02T12:55:00Z |
|
| 10 |
| value |
0.00052 |
| scoring_system |
epss |
| scoring_elements |
0.16579 |
| published_at |
2026-04-04T12:55:00Z |
|
|
| url |
https://api.first.org/data/v1/epss?cve=CVE-2026-4923 |
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| 2 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| Weaknesses |
| 0 |
| cwe_id |
1333 |
| name |
Inefficient Regular Expression Complexity |
| description |
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. |
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| Exploits |
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| Severity_range_score | 4.0 - 6.9 |
| Exploitability | 0.5 |
| Weighted_severity | 6.2 |
| Risk_score | 3.1 |
| Resource_url | http://public2.vulnerablecode.io/vulnerabilities/VCID-366w-k4rs-v7d3 |