CVE-2026-77647SPIP Code Injection
SPIP before 4.4.20 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026.
Published Aug 20, 2026 · Updated Oct 26, 2026 · Also known as EUVD-2026-63757, UBUNTU-CVE-2026-77647
Key Facts
Patch immediately- CVE-2026-77647 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting SPIP.
- It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Aug 20, 2026. Public exploit code is available.
- EPSS estimates a 2.3% probability of exploitation in the next 30 days.
- Fixed versions are available, including SPIP 4.4.20+dfsg-0+deb13u1, SPIP 4.4.20+dfsg-1, SPIP 4.4.20.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
2.3%
Higher than 83.1% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
67/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Aug 20, 2026
0 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
3
Proof-of-concept links
In-the-wild evidence
6
Reports of active use
Advisories And Exploit References
Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CIRCL KEV | Aug 20, 2026 | n/a | Not reported |
| Industry KEV feed | Aug 20, 2026 | n/a | Not reported |
Affected Products
14 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SPIPSpip | See advisory | 4.4.20 |
Patched Releases
SPIP
4.4.20+dfsg-0+deb13u1, 4.4.20+dfsg-1, 4.4.20
Timeline
Publicly disclosed
Aug 20, 2026
Added to CIRCL KEV
Aug 20, 2026
Added to Industry KEV feed
Aug 20, 2026
Last updated
Oct 26, 2026
Weakness Type
- CWE-94 Improper Control of Generation of Code ('Code Injection')
References
- advisoryubuntu.com · CVE-2026-77647
- advisoryVulnCheck exploitation report
- advisoryblog.spip.net · Mise-a-jour-critique-de-securite-sortie-de-SPIP…
- advisorylists.debian.org · msg00359.html
- exploitVulnCheck exploitation report
FAQ
Common Questions.
SPIP before 4.4.20 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026.
Affected: SPIP. The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Aug 20, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including SPIP 4.4.20+dfsg-0+deb13u1, SPIP 4.4.20+dfsg-1, SPIP 4.4.20.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2026-77647 On Your Attack Surface?
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