CVE-2026-77647 json
SPIP before 4.4.20 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026.
published 2026-08-20 2 mo ago modified 2026-10-26 14 d ago also EUVD-2026-63757
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.3%
- EPSS 2.3% chance of exploitation in 30 days, percentile 83%
- public exploits
- 1
- Metasploit
Summary
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.
Patch / fix
- SPIP SPIP 4.4.20
- spip Debian 13 4.4.20+dfsg-0+deb13u1
- spip Debian 14 4.4.20+dfsg-1
debian advisories DEBIAN-CVE-2026-77647
Timeline
- First public exploit (Metasploit exploit/multi/http/spip_x_spip_filtre_rce)
- Published
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
2.29% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Metasploit exploit/multi/http/spip_x_spip_filtre_rce SPIP X-Spip-Filtre Unauthenticated RCE metasploit exploit, excellent rank, 2026-08-20
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- SPIP SPIP
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
blog.spip.net
/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-20.html
vendor-advisory
-
lists.debian.org
/debian-security-announce/2026/msg00359.html
third-party-advisory
Sources
- CVE List CVE-2026-77647
- NVD CVE-2026-77647
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