Symphony has an Authentication Bypass via RememberMe
Priority MEDIUM 40CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-287.
Summary
Symphony process is a module for the Symphony PHP framework which executes commands in sub-processes. When consuming a persisted remember-me cookie, Symfony does not check if the username persisted in the database matches the username attached with the cookie, leading to authentication bypass. This vulnerability is fixed in 5.4.47, 6.4.15, and 7.1.8.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0062 49th percentileScored 2026-11-07
Fix Fixed symfony (symfony): 5.4.47, 6.4.15, 7.1.8symfony/security-http (Packagist): 5.4.47, 6.4.15, 7.1.8
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| symfony | symfony | 5.3.0 to before 5.4.47; 6.0.0-BETA1 to before 6.4.15; 7.0.0-BETA1 to before 7.1.8 | 5.4.47, 6.4.15, 7.1.8 | Patch available | CNA |
| — | symfony/security-http (Packagist) | 5.3.0 to before 5.4.47 | 5.4.47 | Patch available | GHSA-cg23-qf8f-62rr |
| — | symfony/security-http (Packagist) | 6.0.0-BETA1 to before 6.4.15 | 6.4.15 | Patch available | GHSA-cg23-qf8f-62rr |
| — | symfony/security-http (Packagist) | 7.0.0-BETA1 to before 7.1.8 | 7.1.8 | Patch available | GHSA-cg23-qf8f-62rr |
- symfony Vendorsymfony Affected 5.3.0 to before 5.4.47; 6.0.0-BETA1 to before 6.4.15; 7.0.0-BETA1 to before 7.1.8 Fixed in 5.4.47, 6.4.15, 7.1.8 Patch available CNA
- symfony/security-http (Packagist) Vendor— Affected 5.3.0 to before 5.4.47 Fixed in 5.4.47 Patch available GHSA-cg23-qf8f-62rr
- symfony/security-http (Packagist) Vendor— Affected 6.0.0-BETA1 to before 6.4.15 Fixed in 6.4.15 Patch available GHSA-cg23-qf8f-62rr
- symfony/security-http (Packagist) Vendor— Affected 7.0.0-BETA1 to before 7.1.8 Fixed in 7.1.8 Patch available GHSA-cg23-qf8f-62rr
CPE names CISA-ADP · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:symphony_php_framework:symphony_process:*:*:*:*:*:*:*:* | — | — | — |
- cpe:2.3:a:symphony_php_framework:symphony_process:*:*:*:*:*:*:*:* Versions — — ·—
Remediation
- Fix · CNA symfony (symfony) Fixed in 5.4.47, 6.4.15, 7.1.8
- Fix · GHSA-cg23-qf8f-62rr symfony/security-http (Packagist) Fixed in 5.4.47 Advisory →
- Fix · GHSA-cg23-qf8f-62rr symfony/security-http (Packagist) Fixed in 6.4.15 Advisory →
- Fix · GHSA-cg23-qf8f-62rr symfony/security-http (Packagist) Fixed in 7.1.8 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2024-51996
- 2026-10-03 Alias added: GHSA-cg23-qf8f-62rr
References
Other 6
- https://github.com/symfony/symfony/security/advisories/GHSA-cg23-qf8f-62rr
- https://github.com/symfony/symfony/commit/81354d392c5f0b7a52bcbd729d6f82501e94135a
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2024-51996.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2024-51996.yaml
- https://github.com/symfony/symfony
- https://symfony.com/cve-2024-51996
More symfony vulnerabilities
- TI-2024-33775 Ability to change environment from query in symfony/runtime CVSS 3.1HIGH 7.3
- TI-2026-34283 Twig: The `spaceless` filter implicitly marks its output as safe CVSS 4.0MEDIUM 5.1
- TI-2022-07667 Code injection in Twig CVSS 3.1CRITICAL 9.8
- TI-2018-10028 Twig before 2.4.4 allows Server-Side Template Injection (SSTI) via the search search_key… CVSS 3.0CRITICAL 9.8
- TI-2026-35851 Incorrect authorization in symfony CVSS 4.0HIGH 8.7
- TI-2026-35264 Improper input validation in symfony CVSS 4.0HIGH 8.3
Sources
- CVE-2024-51996 · CVE Program
- CVE-2024-51996 · NVD
- FIRST EPSS
- GHSA-cg23-qf8f-62rr · GitHub Advisory Database · CC BY 4.0
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