CVE-2026-50139 (GCVE-0-2026-50139)
Vulnerability from cvelistv5
Published
2026-08-18 15:01
Modified
2026-08-19 14:34
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Summary
goshs is a SimpleHTTPServer written in Go. Prior to version 2.1.0, `ShareHandler` reads the share token's `DownloadLimit` under `RLock`, releases the lock, serves the file, then re-acquires the lock to increment the counter. Concurrent requests all read the same `Downloaded`/`DownloadLimit` snapshot, all pass the check, and all are served — exceeding the operator's intended cap. Version 2.1.0 patches the issue.
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| patrickhener | goshs |
Version: < 2.1.0 |
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"id": "CVE-2026-50139",
"options": [
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{
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"role": "CISA Coordinator",
"timestamp": "2026-08-19T14:33:06.319046Z",
"version": "2.0.3"
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"providerMetadata": {
"dateUpdated": "2026-08-19T14:34:47.743Z",
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"url": "https://github.com/goshs-labs/goshs/security/advisories/GHSA-j48m-h7xq-2xpj"
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"vendor": "patrickhener",
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"value": "goshs is a SimpleHTTPServer written in Go. Prior to version 2.1.0, `ShareHandler` reads the share token\u0027s `DownloadLimit` under `RLock`, releases the lock, serves the file, then re-acquires the lock to increment the counter. Concurrent requests all read the same `Downloaded`/`DownloadLimit` snapshot, all pass the check, and all are served \u2014 exceeding the operator\u0027s intended cap. Version 2.1.0 patches the issue."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
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"problemTypes": [
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"descriptions": [
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"cweId": "CWE-362",
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"url": "https://github.com/goshs-labs/goshs/security/advisories/GHSA-j48m-h7xq-2xpj"
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"source": {
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"discovery": "UNKNOWN"
},
"title": "goshs: Share-link ?token=\u2026 redemption races past download limit"
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"datePublished": "2026-08-18T15:01:36.900Z",
"dateReserved": "2026-06-03T18:49:32.275Z",
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"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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