CVE-2026-45065 json
Symfony: UrlGenerator Route-Requirement Bypass via Unanchored Regex Alternation → Off-Site //host URL Injection
published 2026-05-27 5 mo ago modified 2026-09-10 1 mo ago also GHSA-72xp-p242-47p9 , EUVD-2026-44323
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 28%
- public exploits
- 0
- none known
Summary
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, UrlGenerator validates route parameters against a pattern built as ^ plus the raw requirement plus $; with ungrouped alternations, middle alternatives match as unanchored substrings, allowing a value such as //evil.com to satisfy a common locale requirement and generate a protocol-relative off-site URL. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
Patch / fix
- packagist symfony/routing 5.4.52, 6.4.40, 7.4.12, 8.0.12
- packagist symfony/symfony 5.4.52, 6.4.40, 7.4.12, 8.0.12
- sensiolabs symfony 5.4.52, 6.4.40, 7.4.12, 8.0.12
- symfony Debian 12 5.4.53+dfsg-0+deb12u1
- symfony Debian 13 6.4.41+dfsg-0+deb13u1
- symfony Debian 14 7.4.12+dfsg-1
debian advisories DEBIAN-CVE-2026-45065
- github.com/symfony/symfony@bcf487c commit
- github.com/symfony/symfony/releases/tag/v5.4.52 release
- github.com/symfony/symfony/releases/tag/v6.4.40 release
- github.com/symfony/symfony/releases/tag/v7.4.12 release
- github.com/symfony/symfony/releases/tag/v8.0.12 release
- github.com/symfony/symfony/security/advisories/GHSA-72xp-p242-47p9 advisory
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 2.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N |
| CNA | 4.0 | 2.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/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 |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | symfony/routing | <5.4.52 >=6.0.0, <6.4.40 >=7.0.0, <7.4.12 >=8.0.0, <8.0.12 |
5.4.52 6.4.40 7.4.12 8.0.12 |
| packagist | symfony/symfony | <5.4.52 >=6.0.0, <6.4.40 >=7.0.0, <7.4.12 >=8.0.0, <8.0.12 |
5.4.52 6.4.40 7.4.12 8.0.12 |
Affected products
- symfony symfony
Classification
References
-
github.com
/symfony/symfony/security/advisories/GHSA-72xp-p242-47p9
web, patch, vendor-advisory
-
github.com
/symfony/symfony/commit/bcf487c22f3240ba994124e0e0fe8616f3cfc47a
web
-
github.com
/symfony/symfony/releases/tag/v5.4.52
product, release-notes
-
github.com
/symfony/symfony/releases/tag/v6.4.40
product, release-notes
-
github.com
/symfony/symfony/releases/tag/v7.4.12
product, release-notes
-
github.com
/symfony/symfony/releases/tag/v8.0.12
product, release-notes
-
github.com
/FriendsOfPHP/security-advisories/blob/master/symfony/routing/CVE-2026-45065.yaml
web
-
github.com
/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45065.yaml
web
-
github.com
/symfony/symfony
package
-
symfony.com
/cve-2026-45065
web
Sources
- CVE List CVE-2026-45065
- GitHub Advisory GHSA-72xp-p242-47p9
- NVD CVE-2026-45065
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.