CVE-2026-16809

HIGHPre-NVD 7.27.2
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 85% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 4 sources updated this weekElevated
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.2Exploit: Elevated riskExposed: 0

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

LimeSurvey Community Edition 7.0.5 contains a stored cross-site scripting vulnerability in the survey quota creation workflow. An authenticated low-privileged user who can create and manage their own survey can store malicious JavaScript in a quota message.

This issue affects LimeSurvey: 7.0.5.

CVSS v3
7.2
EG Score
7.2(medium)
EG Risk
48(Track*)
EG Risk 48/100SSVC: 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
Severity72% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

August 26, 2026

Last Modified

August 28, 2026

Advisory Details (2)

Auto-updated Aug 26, 2026
No patch confirmed yet.
generic

GitHub - LimeSurvey/LimeSurvey: 🔥 LimeSurvey – A powerful, open-source survey platform. A free alternative to SurveyMonkey, Typeform, Qualtrics, and Google Forms, making it simple to create online surveys and forms with unmatched flexibility. · GitHub

https://github.com/LimeSurvey/LimeSurvey
generic

LimeSurvey Community Edition 7.0.5 - Stored XSS in quota message rendering | Fluid Attacks

https://fluidattacks.com/es/advisories/wellerman

Vendor Advisories for CVE-2026-16809(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 17× in last 7d / 17× 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. 2026-08-30 04:17 UTCEG score recompute
  2. 2026-08-30 04:17 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 16:08 UTCGHSA enrichment
  5. 2026-08-29 03:57 UTCEG score recompute
  6. 2026-08-29 03:57 UTCGHSA enrichment
  7. 2026-08-28 21:41 UTCEPSS rescore
  8. 2026-08-28 15:46 UTCGHSA enrichment
  9. 2026-08-28 08:35 UTCEG score recompute
  10. 2026-08-28 08:35 UTCGHSA enrichment
  11. 2026-08-27 20:18 UTCEG score recompute
  12. 2026-08-27 20:18 UTCGHSA enrichment
  13. 2026-08-27 14:25 UTCEPSS rescore
  14. 2026-08-27 10:32 UTCGHSA enrichment
  15. 2026-08-26 22:24 UTCEG score recompute
  16. 2026-08-26 22:02 UTCEG score recompute
  17. 2026-08-26 22:01 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-16809?
CVE-2026-16809 is a high vulnerability published on August 26, 2026. LimeSurvey Community Edition 7.0.5 contains a stored cross-site scripting vulnerability in the survey quota creation workflow. An authenticated low-privileged user who can create and manage their own survey can store malicious JavaScript in a quota message. This issue affects LimeSurvey: 7.0.5.
When was CVE-2026-16809 disclosed?
CVE-2026-16809 was first published in the National Vulnerability Database on August 26, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16809 actively exploited?
CVE-2026-16809 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 84.7% of all scored CVEs.
What is the CVSS score of CVE-2026-16809?
CVE-2026-16809 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-16809?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16809, 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-2026-16809

Explore →

Is Your Infrastructure Affected by CVE-2026-16809?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.