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.

We have discovered 8,029 live websites that are affected by CVE-2026-77806.

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Affected Software

Product  SPIP
Category Content Management System
Vulnerable Domains8,029 live websites (100% of SPIP install base)
Vulnerable Versions
  • from 0 through 4.4.21
Vulnerable Versions Count155 versions ( 100% of all versions)


Common Weakness Enumeration

CWE-94 Improper Control of Generation of Code ('Code Injection')



Details

  • Published - Aug 21, 2026
  • Updated - Aug 21, 2026

Website Distribution by Country

Number of websites using CVE-2026-77806
United States654 websites


France5,937 websites
Switzerland376 websites
Belgium258 websites
Germany194 websites
Italy130 websites
Canada94 websites
Spain73 websites
Ukraine36 websites
GB36 websites

Website Distribution by TLD

Number of websites using CVE-2026-77806
.fr2,705 websites
.com2,025 websites
.org1,287 websites
.net593 websites
.be300 websites
.eu217 websites
.info155 websites
.it100 websites
.ch80 websites
.de51 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-77806

Top websites that are affected by CVE-2026-77806. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
****.net France*,***
********.fr France**,***
*****************.fr France**,***
******************.fr France**,***
**********.com France**,***
***.org France**,***
****.org France**,***
******.net France**,***
*******.****.net France**,***
********.fr United States**,***
See full domain list

FAQ

CVE-2026-77806 is Improper Control of Generation of Code ('Code Injection') in SPIP
A total of 8,029 websites have been identified as vulnerable to CVE-2026-77806, based on global website indexing conducted by WebTechSurvey.
The SPIP is affected by the CVE-2026-77806 vulnerability.
SPIP versions up to 4.4.21 are vulnerable to CVE-2026-77806.
CVE-2026-77806 is resolved in version 4.4.21 of SPIP.