> CVE-2026-48784 [MEDIUM]

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PUBLISHED
2026-07-14 20:17
MODIFIED
2026-07-14 20:25
CVSS_SCORE V3
5.1
EPSS (Prob. Exploit)
0.35%
Top 71.5%
DATA SOURCES:
NVD đź”— 2026-07-14 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-01 GITHUB đź”— 2026-11-05 OSV đź”— 2026-11-02

> DESCRIPTION

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, UrlGenerator::doGenerate() used strtr() dot-segment encoding that skipped every other chained ../ or ./ segment, allowing attacker-controlled route parameters to generate URLs that collapse to a different path under RFC 3986 normalization. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.

> AFFECTED_PRODUCTS

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

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-172 CWE-601

> CWE DETAILED DESCRIPTIONS

CWE-172: Improper Encoding or Decoding of Data - The product does not properly encode or decode data, resulting in unexpected values that are not equivalent to the original data. | CWE-601: URL Redirection to Untrusted Site - The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.

> GITHUB SECURITY ADVISORY

GHSA-h5x3-xfc9-m39h MODERATE

Symfony: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Generated URL Collapses Off-Route Under RFC 3986 Normalization

AFFECTED PACKAGES:
COMPOSER / symfony/symfony
>= 8.0.0, < 8.0.13
Fixed in: 8.0.13
COMPOSER / symfony/symfony
>= 7.0.0, < 7.4.13
Fixed in: 7.4.13
COMPOSER / symfony/symfony
>= 6.0.0, < 6.4.41
Fixed in: 6.4.41
COMPOSER / symfony/symfony
< 5.4.53
Fixed in: 5.4.53
COMPOSER / symfony/routing
>= 8.0.0, < 8.0.13
Fixed in: 8.0.13
COMPOSER / symfony/routing
>= 7.0.0, < 7.4.13
Fixed in: 7.4.13
COMPOSER / symfony/routing
>= 6.0.0, < 6.4.41
Fixed in: 6.4.41
COMPOSER / symfony/routing
< 5.4.53
Fixed in: 5.4.53

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Symfony: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Generated URL Collapses Off-Route Under RFC 3986 Normalization

AFFECTED PACKAGES:
Unknown / Unknown
249 versions affected
ALIASES:
GHSA-h5x3-xfc9-m39h

> HISTORIQUE DES MODIFICATIONS

Première apparition
14/07/2026 20:17
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:59
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-172: Encoding Error - The product does not properly encode or decode the data, resulting in unexpected values. | CWE-601: URL Redirection to Untrusted Site ('Open Redirect') - The web application ...
Nouvelle valeur:
CWE-172: Improper Encoding or Decoding of Data - The product does not properly encode or decode data, resulting in unexpected values that are not equivalent to the original data. | CWE-601: URL Redire...
📊 ENRICHISSEMENT 01/08/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-172: Encoding Error - The product does not properly encode or decode the data, resulting in unexpected values. | CWE-601: URL Redirection to Untrusted Site ('Open Redirect') - The web application ...
Total des modifications: 2 Dernière mise à jour: 5 days ago

> REFERENCES

https://github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b...
https://github.com/symfony/symfony/releases/tag/v5.4.53
https://github.com/symfony/symfony/releases/tag/v6.4.41
https://github.com/symfony/symfony/releases/tag/v7.4.13
https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h
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