CVE-2026-77647
SPIP before 4.4.20 allows unauthenticated remote attackers to execute arbitrary code, as...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2026-77647- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-94
- Updated
- 2026-11-02
EUVDEUVD-2026-63757
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.
- Record
EUVD-2026-63757- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-wj6g-rh9q-6vvm
SPIP before 4.4.20 allows unauthenticated remote attackers to execute arbitrary code, as...
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.
- Record
GHSA-wj6g-rh9q-6vvm- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-94
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-77647- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-94
- Updated
- 2026-11-02
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2026-77647- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2026-77647- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
spipDebian:13 |
before 4.4.20+dfsg-0+deb13u1, plus listed versions 4.4.10+dfsg-14.4.11+dfsg-0+deb13u14.4.11+dfsg-14.4.13+dfsg-0+deb13u14.4.13+dfsg-1 Show 16 moreShow less4.4.14+dfsg-14.4.15+dfsg-0+deb13u14.4.15+dfsg-14.4.16+dfsg-0+deb13u14.4.16+dfsg-14.4.18+dfsg-14.4.19+dfsg-0+deb13u14.4.19+dfsg-14.4.3+dfsg-14.4.3+dfsg-1+deb13u14.4.4+dfsg-14.4.5+dfsg-14.4.6+dfsg-14.4.7+dfsg-14.4.8+dfsg-14.4.9+dfsg-1 |
4.4.20+dfsg-0+deb13u1 |
spipDebian:14 |
before 4.4.20+dfsg-1, plus listed versions 4.4.10+dfsg-14.4.11+dfsg-14.4.13+dfsg-14.4.14+dfsg-14.4.15+dfsg-1 Show 10 moreShow less4.4.16+dfsg-14.4.18+dfsg-14.4.19+dfsg-14.4.3+dfsg-14.4.4+dfsg-14.4.5+dfsg-14.4.6+dfsg-14.4.7+dfsg-14.4.8+dfsg-14.4.9+dfsg-1 |
4.4.20+dfsg-1 |
spipUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 3.0.20-13.0.21-13.0.21-1ubuntu13.0.21-1ubuntu1+esm1 |
None known |
spipUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 3.1.4-33.1.4-4~deb9u3build0.18.04.13.1.4-4~deb9u5build0.18.04.13.1.4-4~deb9u5ubuntu0.1~esm2 |
None known |
spipUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 3.2.4-13.2.5-13.2.7-13.2.7-1ubuntu0.13.2.7-1ubuntu0.1+esm2 |
None known |
spipUbuntu:22.04:LTS |
All versions, plus listed versions 3.2.11-33.2.12-14.0.2-14.0.4-1 |
None known |
spipUbuntu:24.04:LTS |
All versions, plus listed versions 4.1.11+dfsg-14.1.12+dfsg-14.1.13+dfsg-14.1.15+dfsg-14.2.9+dfsg-2 |
None known |
spipUbuntu:26.04:LTS |
All versions, plus listed versions 4.4.3+dfsg-14.4.6+dfsg-14.4.7+dfsg-14.4.8+dfsg-14.4.9+dfsg-1 |
None known |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Metasploit | SPIP X-Spip-Filtre Unauthenticated RCE | 2026-08-20 |
| PoC in GitHub | Nxploited/CVE-2026-77647 | 2026-10-26 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, Metasploit, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-77647 is a critical vulnerability (CVSS 9.8) in Spip, published August 20, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.29%, the 83rd percentile. Fixed in spip 4.4.20+dfsg-0+deb13u1.
References
blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-20.html
lists.debian.org/debian-security-announce/2026/msg00359.html
nvd.nist.gov/vuln/detail/CVE-2026-77647
github.com/advisories/GHSA-wj6g-rh9q-6vvm
security-tracker.debian.org/tracker/CVE-2026-77647
ubuntu.com/security/CVE-2026-77647
cve.org/CVERecord?id=CVE-2026-77647