SPIP: remote code execution

SPIP

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.

Fix it

Upgrade to SPIP 4.4.20

First seen: 26 Oct 2026
Last update: 26 Oct 2026, 23:17 UTC
Fixed in: 4.4.20
Identifiers: CVE-2026-77647
CVSS: 9.8
Source: news

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## SPIP: remote code execution
Severity: critical. Patch status: patched.
Affected: SPIP
Fixed in: 4.4.20
Ids: CVE-2026-77647

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.

## Steps
1. Search the repo, its CI and infra config for SPIP. If present, report the version in use and whether it's affected.
2. Fix by release line: SPIP: 4.4.20.

## Fix by release line
| Line | State | Fix | Until then |
|---|---|---|---|
| SPIP | fixed | 4.4.20 | — |

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-77647") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-20.html https://nvd.nist.gov/vuln/detail/CVE-2026-77647
https://pwned.coffee/i/spip-remote-code-execution-cve-2026-77647

Timeline

26 Oct 2026, 23:17 UTC
Fix status: unknown → patched.
26 Oct 2026
First reported.

Receipt

Exploitation: No known exploitation
Fix by release line: Product Affected Fixed in Source
SPIP before 4.4.20 4.4.20 CVE record (CNA) checked 26 Oct
Score: CVSS 9.8 (critical). CVSS 3.1 9.8 (CNA mitre) for CVE-2026-77647
Last checked: 26 Oct 2026, 23:17 UTC

Product	Affected	Fixed in	Source
SPIP	before 4.4.20	4.4.20	CVE record (CNA) checked 26 Oct

Sources: KEV – CVE record ✓ Vendor ✓

Sources

Wrong fix version, or a source we missed? Send it back to chef@pwned.coffee with the source, and we'll correct it here.

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