CVE-2026-77806
CVSS v3
9.8
CRITICAL
EPSS Score
4.5 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2026-08-21
- Last Modified
- 2026-08-21
Frequently asked questions
What is 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.
Is CVE-2026-77806 actively exploited?
Active exploitation of CVE-2026-77806 has not been confirmed. Its EPSS score was 4.5% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-77806?
CVE-2026-77806 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2026-77806 affecting your environment?
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