CVE-2026-55878 json
Symfony: Path Traversal in symfony/ux-toolkit Allows Arbitrary File Write and Read via Crafted Recipe Manifest
published 2026-06-19 4 mo ago modified 2026-10-25 14 d ago also GHSA-p9xj-fpr2-jf2q , EUVD-2026-42443
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
Summary
Symfony UX is a JavaScript ecosystem for Symfony. From 2.32.0 before 2.36.1 and from 3.0.0 before 3.2.0, the ux:install console command installs files from a recipe kit by copying paths listed in a copy-files map, and because Path::isRelative() accepts paths like ../../../etc, a crafted or compromised kit can write attacker-controlled content to arbitrary locations or read local files outside the recipe directory. This issue is fixed in versions 2.36.1 and 3.2.0.
Patch / fix
- packagist symfony/ux-toolkit 2.36.1, 3.2.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | symfony/ux-toolkit | >=2.32.0, <2.36.1 >=3.0.0, <3.2.0 |
2.36.1 3.2.0 |
Affected products
- symfony ux
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
- github.com /symfony/ux/commit/7b4ddf3764bf269a1b5fde5bf03c4bce568694e4
-
github.com
/symfony/ux/security/advisories/GHSA-p9xj-fpr2-jf2q
web
- github.com /symfony/ux/releases/tag/v2.36.1
- github.com /symfony/ux/releases/tag/v3.2.0
-
github.com
/FriendsOfPHP/security-advisories/blob/master/symfony/ux-toolkit/CVE-2026-55878.yaml
web
-
github.com
/symfony/ux
package
Sources
- CVE List CVE-2026-55878
- GitHub Advisory GHSA-p9xj-fpr2-jf2q
- NVD CVE-2026-55878
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