Server-side request forgery in symfony
Priority LOW 31CWE-184Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 5.4.0 to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, NoPrivateNetworkHttpClient and IpUtils::PRIVATE_SUBNETS omitted IPv6 transition prefixes such as 6to4, NAT64, Teredo, and IPv4-compatible IPv6, allowing attacker-supplied URLs to represent private IPv4 targets in forms that IpUtils::isPrivateIp() did not block. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0057 47th percentileScored 2026-11-07
Fix Fixed symfony (symfony): 5.4.53, 6.4.41, 7.4.13 +1http-client (symfony): 5.4.53+4 more products
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- 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 | 5.4.0 to before 5.4.53; 6.0.0-BETA1 to before 6.4.41; 7.0.0-BETA1 to before 7.4.13; 8.0.0-BETA1 to before 8.0.13 | 5.4.53, 6.4.41, 7.4.13, 8.0.13 | Patch available | CNA |
| symfony | http-client | 5.4.0 to before 5.4.53 | 5.4.53 | Patch available | CNA |
| symfony | http-foundation | 6.0.0-BETA1 to before 6.4.41; 7.0.0-BETA1 to before 7.4.13; 8.0.0-BETA1 to before 8.0.13 | 6.4.41, 7.4.13, 8.0.13 | Patch available | CNA |
| — | symfony/http-client (Packagist) | 5.4.0 to before 5.4.53 | 5.4.53 | Patch available | GHSA-38cx-cq6f-5755 |
| — | symfony/http-foundation (Packagist) | 6.4.0 to before 6.4.41 | 6.4.41 | Patch available | GHSA-38cx-cq6f-5755 |
| — | symfony/http-foundation (Packagist) | 7.0.0 to before 7.4.13 | 7.4.13 | Patch available | GHSA-38cx-cq6f-5755 |
| — | symfony/http-foundation (Packagist) | 8.0.0 to before 8.0.13 | 8.0.13 | Patch available | GHSA-38cx-cq6f-5755 |
| — | symfony/symfony (Packagist) | 5.4.0 to before 5.4.53 | 5.4.53 | Patch available | GHSA-38cx-cq6f-5755 |
| — | symfony/symfony (Packagist) | 6.4.0 to before 6.4.41 | 6.4.41 | Patch available | GHSA-38cx-cq6f-5755 |
| — | symfony/symfony (Packagist) | 7.0.0 to before 7.4.13 | 7.4.13 | Patch available | GHSA-38cx-cq6f-5755 |
| — | symfony/symfony (Packagist) | 8.0.0 to before 8.0.13 | 8.0.13 | Patch available | GHSA-38cx-cq6f-5755 |
- symfony Vendorsymfony Affected 5.4.0 to before 5.4.53; 6.0.0-BETA1 to before 6.4.41; 7.0.0-BETA1 to before 7.4.13; 8.0.0-BETA1 to before 8.0.13 Fixed in 5.4.53, 6.4.41, 7.4.13, 8.0.13 Patch available CNA
- http-client Vendorsymfony Affected 5.4.0 to before 5.4.53 Fixed in 5.4.53 Patch available CNA
- http-foundation Vendorsymfony Affected 6.0.0-BETA1 to before 6.4.41; 7.0.0-BETA1 to before 7.4.13; 8.0.0-BETA1 to before 8.0.13 Fixed in 6.4.41, 7.4.13, 8.0.13 Patch available CNA
- symfony/http-client (Packagist) Vendor— Affected 5.4.0 to before 5.4.53 Fixed in 5.4.53 Patch available GHSA-38cx-cq6f-5755
- symfony/http-foundation (Packagist) Vendor— Affected 6.4.0 to before 6.4.41 Fixed in 6.4.41 Patch available GHSA-38cx-cq6f-5755
- symfony/http-foundation (Packagist) Vendor— Affected 7.0.0 to before 7.4.13 Fixed in 7.4.13 Patch available GHSA-38cx-cq6f-5755
- symfony/http-foundation (Packagist) Vendor— Affected 8.0.0 to before 8.0.13 Fixed in 8.0.13 Patch available GHSA-38cx-cq6f-5755
- symfony/symfony (Packagist) Vendor— Affected 5.4.0 to before 5.4.53 Fixed in 5.4.53 Patch available GHSA-38cx-cq6f-5755
- symfony/symfony (Packagist) Vendor— Affected 6.4.0 to before 6.4.41 Fixed in 6.4.41 Patch available GHSA-38cx-cq6f-5755
- symfony/symfony (Packagist) Vendor— Affected 7.0.0 to before 7.4.13 Fixed in 7.4.13 Patch available GHSA-38cx-cq6f-5755
- symfony/symfony (Packagist) Vendor— Affected 8.0.0 to before 8.0.13 Fixed in 8.0.13 Patch available GHSA-38cx-cq6f-5755
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* | 5.4.0 to before 5.4.43; 6.4.0 to before 6.4.41; 7.0.0 to before 7.4.13; 8.0.0 to before 8.0.13 | Vulnerable | sensiolabs |
- cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* Versions 5.4.0 to before 5.4.43; 6.4.0 to before 6.4.41; 7.0.0 to before 7.4.13; 8.0.0 to before 8.0.13 Vulnerable ·sensiolabs
Remediation
- Fix · CNA symfony (symfony) Fixed in 5.4.53, 6.4.41, 7.4.13, 8.0.13
- Fix · CNA http-client (symfony) Fixed in 5.4.53
- Fix · CNA http-foundation (symfony) Fixed in 6.4.41, 7.4.13, 8.0.13
- Fix · GHSA-38cx-cq6f-5755 symfony/http-client (Packagist) Fixed in 5.4.53 Advisory →
- Fix · GHSA-38cx-cq6f-5755 symfony/http-foundation (Packagist) Fixed in 6.4.41 Advisory →
- Fix · GHSA-38cx-cq6f-5755 symfony/http-foundation (Packagist) Fixed in 7.4.13 Advisory →
- Fix · GHSA-38cx-cq6f-5755 symfony/http-foundation (Packagist) Fixed in 8.0.13 Advisory →
- Fix · GHSA-38cx-cq6f-5755 symfony/symfony (Packagist) Fixed in 5.4.53 Advisory →
- Fix · GHSA-38cx-cq6f-5755 symfony/symfony (Packagist) Fixed in 6.4.41 Advisory →
- Fix · GHSA-38cx-cq6f-5755 symfony/symfony (Packagist) Fixed in 7.4.13 Advisory →
- Fix · GHSA-38cx-cq6f-5755 symfony/symfony (Packagist) Fixed in 8.0.13 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-48736
- 2026-10-03 Alias added: GHSA-38cx-cq6f-5755
References
Patch 3
Other 8
- 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/FriendsOfPHP/security-advisories/blob/master/symfony/http-client/CVE-2026-48736.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2026-48736.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-48736.yaml
- https://github.com/symfony/symfony
- https://symfony.com/cve-2026-48736
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-2026-48736 · CVE Program
- CVE-2026-48736 · NVD
- FIRST EPSS
- GHSA-38cx-cq6f-5755 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences