CVE-2026-77806
Critical
Description
SPIP before 4.4.21 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026. This is related to code injection via an X-Spip-Filtre HTTP request header that is mishandled by analyse_resultat_skel.
SeverityCritical
CVSS9.8
Exploit probability—
Product
SPIP
PublishedAug 21, 2026
First seenAug 21, 2026
Weakness typeCWE-94Code injection
How to fix
Update
- SPIP SPIP4.4.21 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| SPIP SPIP | v < 4.4.21 | 4.4.21 |
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