CVE-2026-77806

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.

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

4.20% chance of exploitation in the next 30 days, 90th percentile

Nuclei

critical · CWE-94

Published

2026-08-21

Proof-of-concept exploits (1)

• CuteeCat/CVE-2026-778062★ · 2026-08-24

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-77806.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2026-48710
• CVE-2026-73633
• CVE-2026-9198
• CVE-2026-7780
• CVE-2026-7781
• CVE-2026-77790