> CVE-2026-50013 [HIGH]

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PUBLISHED
2026-09-11 22:16
MODIFIED
2026-09-11 22:16
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
0.47%
Top 60.7%
DATA SOURCES:
NVD đź”— 2026-09-11 CWE MITRE đź”— 2026-10-01 FIRST EPSS đź”— 2026-10-18 GITHUB đź”— 2026-09-18 OSV đź”— 2026-10-26

> DESCRIPTION

Hoverfly is an open source API simulation tool. Prior to version 1.12.8, when Hoverfly is running in Diff mode, the `AddDiff()` function writes to the shared `responsesDiff` map without any synchronization (no mutex). When multiple proxy requests are processed concurrently (the normal case for any proxy), the concurrent map writes trigger Go's built-in race detector which causes a `fatal error: concurrent map read and map write`, immediately killing the entire Hoverfly process. This is trivially exploitable by sending multiple simultaneous requests. Version 1.12.8 patches the issue.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EXPLOITABILITY
3.9
IMPACT
3.6

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-362 CWE-820

> CWE DETAILED DESCRIPTIONS

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') - The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. | CWE-820: Missing Synchronization - The product utilizes a shared resource in a concurrent manner but does not attempt to synchronize access to the resource.

> GITHUB SECURITY ADVISORY

GHSA-qrh4-p6v4-mrfg HIGH

Hoverfly: Process Crash via Concurrent Map Write Race Condition in Diff Mode

AFFECTED PACKAGES:
GO / github.com/SpectoLabs/hoverfly
<= 1.12.7
Fixed in: 1.12.8

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Hoverfly: Process Crash via Concurrent Map Write Race Condition in Diff Mode

AFFECTED PACKAGES:
Unknown / Unknown
122 versions affected
ALIASES:
GHSA-qrh4-p6v4-mrfg, GO-2026-5977

> HISTORIQUE DES MODIFICATIONS

Première apparition
11/09/2026 22:16
Source: NVD
đź“Š ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') - The product contains a concurrent code sequence that requires temporary, exclusive access to a sh...
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/SpectoLabs/hoverfly/pull/1227
https://github.com/SpectoLabs/hoverfly/releases/tag/v1.12.8
https://github.com/SpectoLabs/hoverfly/security/advisories/GHSA-qrh4-p6v4-mrfg
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