Composer symfony/serializer has 3 known advisories in the phpwarden feed. Feed 2026.10.29.1, updated 2026-10-28.
| CVE | Title | Severity | CVSS | Affected | Fixed in |
|---|---|---|---|---|---|
| CVE-2021-41270 | CSV Injection in symfony/serializer | medium | 6.5 | >=5.0.0 and <5.3.12 or >=4.1.0 and <4.4.35 or >=4.1.0 and <4.2.0 or >=4.2.0 and <4.3.0 or >=4.3.0 and <4.4.0 or >=4.4.0 and <4.4.35 or >=5.0.0 and <5.1.0 or >=5.1.0 and <5.2.0 or >=5.2.0 and <5.3.0 or >=5.3.0 and <5.3.12 | 5.3.12, 4.4.35 |
| GHSA-j68w-pg49-f6vx | Symfony XML decoding attack vector through external entities | critical | 9.8 | >=2.0.0 and <2.0.11 | 2.0.11 |
| 2012-02-24 | XML decoding attack vector through external entities | unknown | 0.0 | >=2.0.0 and <2.0.11 | 2.0.11 |
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