> CVE-2026-55428 [HIGH]

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PUBLISHED
2026-07-08 00:16
MODIFIED
2026-07-08 00:16
CVSS_SCORE V3
8.2
EPSS (Prob. Exploit)
0.40%
Top 65.2%
DATA SOURCES:
NVD 🔗 2026-07-08 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-01 GITHUB 🔗 2026-11-05 OSV 🔗 2026-11-02

> DESCRIPTION

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, the tailnet coordinator validates that an agent's `Addresses` derive from its authenticated UUID but applies no equivalent check to `AllowedIPs`. The coordinator forwards agent-supplied `AllowedIPs` verbatim to tunnel peers which install them into the WireGuard peer configuration. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 validates each `AllowedIPs` prefix against the authenticating agent's UUID just like `Addresses`. As a workaround, monitor coordinator logs for agents advertising unexpected `AllowedIPs` prefixes.

> 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:H/PR:L/UI:N/S:C/C:H/I:H/A:N
EXPLOITABILITY
1.8
IMPACT
5.8

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
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
High (H)
Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis)
Privileges Required
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Changed (C)
Impact s'étend au-delà du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-285 CWE-863

> CWE DETAILED DESCRIPTIONS

CWE-285: Improper Authorization - The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. | CWE-863: Incorrect Authorization - The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

> GITHUB SECURITY ADVISORY

GHSA-wrq8-fcv5-8hvp HIGH

Coder: Route hijacking through lack of validation of agent-supplied AllowedIPs in tailnet coordinator

AFFECTED PACKAGES:
GO / github.com/coder/coder/v2
< 2.29.17
Fixed in: 2.29.17
GO / github.com/coder/coder/v2
>= 2.30.0, < 2.32.7
Fixed in: 2.32.7
GO / github.com/coder/coder/v2
>= 2.33.0, < 2.33.8
Fixed in: 2.33.8
GO / github.com/coder/coder/v2
>= 2.34.0, < 2.34.2
Fixed in: 2.34.2

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Coder: Route hijacking through lack of validation of agent-supplied AllowedIPs in tailnet coordinator

AFFECTED PACKAGES:
Unknown / Unknown
192 versions affected
ALIASES:
GHSA-wrq8-fcv5-8hvp, GO-2026-5915

> HISTORIQUE DES MODIFICATIONS

Première apparition
08/07/2026 00:16
Source: NVD
📊 ENRICHISSEMENT 01/08/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-285: Improper Authorization - The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. | CWE-863: Incorrect Aut...
Total des modifications: 1 Dernière mise à jour: 3 months ago

> REFERENCES

https://github.com/coder/coder/pull/26144
https://github.com/coder/coder/releases/tag/v2.29.17
https://github.com/coder/coder/releases/tag/v2.32.7
https://github.com/coder/coder/releases/tag/v2.33.8
https://github.com/coder/coder/releases/tag/v2.34.2
https://github.com/coder/coder/security/advisories/GHSA-wrq8-fcv5-8hvp
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