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PUBLISHED

2026-09-21 16:17

MODIFIED

2026-09-21 16:17

CVSS_SCORE V3

7.1

EPSS (Prob. Exploit)

0.17%

Top 93.9%

DATA SOURCES:

NVD 🔗 2026-09-21 CWE MITRE 🔗 2026-10-01 FIRST EPSS 🔗 2026-10-20 GITHUB 🔗 2026-10-15 OSV 🔗 2026-10-19

> DESCRIPTION

Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.91.1, ValidateOAuthState clears the oauth_state_ session value to an empty string after a successful OAuth callback and later accepts an empty state parameter as equal, allowing an unauthenticated attacker to bind a victim's Hatchet session to an attacker-controlled OAuth identity. Exploitation requires the victim to have completed an OAuth flow in the current session and the deployment to enable auth.google.enabled, auth.github.enabled, or the Slack integration. This issue is fixed in version 0.91.1.

> 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:R/S:U/C:L/I:H/A:N

EXPLOITABILITY

2.8

IMPACT

4.2

> MÉTRIQUES CVSS DÉTAILLÉES

                CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/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	Low (L)	Peu de conditions requises pour exploiter
PR (Privilèges Requis) Privileges Required	None (N)	Aucune authentification requise
UI (Interaction Utilisateur) User Interaction	Required (R)	Nécessite une action utilisateur (clic lien, ouverture fichier, etc.)
S (Périmètre) Scope	Unchanged (U)	Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité) Confidentiality Impact	Low (L)	Divulgation limitée 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

Low

Divulgation limitée d'informations

Intégrité

High

Modification totale des données possible

Disponibilité

None

Aucune interruption de service

> WEAKNESSES

CWE-287 CWE-352 CWE-384 CWE-1275

> CWE DETAILED DESCRIPTIONS

CWE-287: Improper Authentication - When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. | CWE-352: Cross-Site Request Forgery (CSRF) - The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. | CWE-384: Session Fixation - Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions. | CWE-1275: Sensitive Cookie with Improper SameSite Attribute - The SameSite attribute for sensitive cookies is not set, or an insecure value is used.

> GITHUB SECURITY ADVISORY

GHSA-phg3-3g28-wq9v HIGH

Hatchet - Unauthenticated OAuth state CSRF / login-CSRF via empty-state collision in ValidateOAuthState

AFFECTED PACKAGES:

GO / hatchet

< 0.91.1

Fixed in: 0.91.1

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

hatchet - Unauthenticated OAuth state CSRF / login-CSRF via empty-state collision in ValidateOAuthState

AFFECTED PACKAGES:

Unknown / Unknown

833 versions affected

ALIASES:

GHSA-phg3-3g28-wq9v, GO-2026-6535

> HISTORIQUE DES MODIFICATIONS

Première apparition

21/09/2026 16:17

Source: NVD

📊 ENRICHISSEMENT 01/10/2026 06:01

CWE

Champ modifié: Description CWE

Ancienne valeur:

N/A

Nouvelle valeur:

Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/hatchet-dev/hatchet/commit/f90464189ad642251e09412d0f99fde353...

https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-phg3-3g28-wq9v