CVE-2026-77647: critical vulnerability in SPIP
Published · Updated
65Vexday Risk Score
Patch now. It exploitation observed by VulnCheck and has a working public exploit.
ssvc Actcvss 9.8epss 2.3%
from disclosure to weapon0 days
Published on NVDAug 20
metasploitAug 20
VulnCheckAug 20
exploitation probability
2.3%top 17% of all CVEs
observed exploitation
yesVulnCheck
SPIP before 4.4.20 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026. This is related to incorrect identification of <?php blocks, and var_export's mishandling of certain cases such as presence of a '<' character.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
SPIP · SPIPRelated CVEs — SPIP
In the same product, most dangerous first.
CVE-2024-8517CRITICALSPIP Bigup Multipart File Upload OS Command InjectionEPSS 94.6%CVE-2024-7954CRITICALSPIP porte_plume Plugin Arbitrary PHP ExecutionEPSS 90.1%CVE-2026-77806CRITICALCVE-2026-77806EPSS 4.5%CVE-2026-72710CRITICALSPIP < 4.4.18 RCE via editer_objet.php Job Queue InjectionEPSS 1.1%CVE-2026-27475CRITICALSPIP < 4.4.9 Insecure DeserializationEPSS 0.9%CVE-2026-8429HIGHSPIP < 4.4.14 Remote Code Execution via Private SpaceEPSS 0.9%