CVE-2026-66738

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-10. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

SPIP before 4.4.18 contains a code injection vulnerability in SQLite-backed installations. The navigation menu endpoint improperly handles array-typed user input, which bypasses input sanitization and allows the value to break out of an internal quoted string context when evaluated as PHP. An authenticated attacker with at minimum editor (redacteur) privileges can submit a single crafted GET request to /ecrire/?exec=navigation to execute arbitrary OS commands in the web server process. MySQL-backed installations are not affected.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 14, 2026

Advisory Details (2)

Auto-updated Aug 10, 2026
No patch confirmed yet.
generic

SPIP < 4.4.18 Code Injection via Navigation Endpoint on SQLite | Advisories | VulnCheck

https://www.vulncheck.com/advisories/spip-code-injection-via-navigation-endpoint-on-sqlite
generic

Mise à jour critique de sécurité : sortie de SPIP 4.4.18 - SPIP Blog

https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-18.html

Vendor Advisories for CVE-2026-66738(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 29× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 00:41 UTCEG score recompute
  2. 2026-08-21 00:41 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 12:05 UTCGHSA enrichment
  5. 2026-08-19 23:18 UTCEG score recompute
  6. 2026-08-19 23:18 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 10:42 UTCGHSA enrichment
  9. 2026-08-18 21:58 UTCEG score recompute
  10. 2026-08-18 21:58 UTCGHSA enrichment
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-18 09:20 UTCGHSA enrichment
  13. 2026-08-17 20:45 UTCEG score recompute
  14. 2026-08-17 20:45 UTCGHSA enrichment
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 08:08 UTCGHSA enrichment
  17. 2026-08-16 19:33 UTCEG score recompute
  18. 2026-08-16 19:33 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 06:57 UTCEG score recompute
  21. 2026-08-16 06:57 UTCGHSA enrichment
  22. 2026-08-15 18:22 UTCGHSA enrichment
  23. 2026-08-15 05:46 UTCEG score recompute
  24. 2026-08-15 05:46 UTCGHSA enrichment
  25. 2026-08-15 01:30 UTCEPSS rescore
Show 21 more
  1. 2026-08-14 17:10 UTCEG score recompute
  2. 2026-08-14 17:10 UTCGHSA enrichment
  3. 2026-08-14 09:31 UTCEG score recompute
  4. 2026-08-14 09:31 UTCGHSA enrichment
  5. 2026-08-13 22:00 UTCEPSS rescore
  6. 2026-08-13 20:55 UTCGHSA enrichment
  7. 2026-08-13 08:19 UTCGHSA enrichment
  8. 2026-08-12 19:44 UTCEG score recompute
  9. 2026-08-12 19:44 UTCGHSA enrichment
  10. 2026-08-12 13:51 UTCEPSS rescore
  11. 2026-08-12 07:09 UTCGHSA enrichment
  12. 2026-08-11 18:33 UTCEG score recompute
  13. 2026-08-11 18:33 UTCGHSA enrichment
  14. 2026-08-11 05:57 UTCEG score recompute
  15. 2026-08-11 05:57 UTCGHSA enrichment
  16. 2026-08-10 17:22 UTCEG score recompute
  17. 2026-08-10 16:50 UTCEG score recompute▼ 1.00
  18. 2026-08-10 16:49 UTCMITRE cvelistV5CVSS v3 → 8.8 · CVSS v4 → 7.7 · severity → HIGH
  19. 2026-08-10 16:29 UTCEG score recompute
  20. 2026-08-10 15:45 UTCEG score recompute
  21. 2026-08-10 15:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66738?
CVE-2026-66738 is a high vulnerability published on August 10, 2026. SPIP before 4.4.18 contains a code injection vulnerability in SQLite-backed installations. The navigation menu endpoint improperly handles array-typed user input, which bypasses input sanitization and allows the value to break out of an internal quoted string context when evaluated as PHP. An…
When was CVE-2026-66738 disclosed?
CVE-2026-66738 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66738 actively exploited?
CVE-2026-66738 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 66.6% of all scored CVEs.
What is the CVSS score of CVE-2026-66738?
CVE-2026-66738 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-66738?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66738, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-66738

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