by Kastro
Paper/Archive/CVE-2026-77647

CVE-2026-77647

SPIP SPIP — SPIP before 4.4.20 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026.

EPSS 2%CVSS 9.8
critical.is priorityof 100
46
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 83.2.832 × 2016.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
SPIP< 4.4.204.4.20CNA

Scores by source

mitre (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisoryblog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-20.htmlwriteuplists.debian.org/debian-security-announce/2026/msg00359.html