The frontend validatate.api.exists action can be exploited by authenticated users to extract plaintext user macro values leading to potential loss of confidentiality.
CVE-2026-23931
MEDIUMPre-NVD 5.35.3—Trending — 4 sources updated this week
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 80% 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
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.3
- EG Score
- 5.3(medium)
- EG Risk
- 24(Track)EG Risk 24/100SSVC: 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 computedSeverity53% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 20%
- KEV
- Not listed
Published
August 18, 2026
Last Modified
August 18, 2026
Advisory Details (1)
Auto-updated Aug 18, 2026No patch confirmed yet.
Vendor Advisories for CVE-2026-23931(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 10× in last 7d / 10× 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.
- 2026-08-20 22:55 UTCEPSS rescore
- 2026-08-20 15:07 UTCEG score recompute
- 2026-08-20 15:07 UTCGHSA enrichment
- 2026-08-19 17:03 UTCEPSS rescore
- 2026-08-19 14:51 UTCGHSA enrichment
- 2026-08-18 14:44 UTCEG score recompute
- 2026-08-18 13:48 UTCEG score recompute
- 2026-08-18 13:20 UTCEG score recompute
- 2026-08-18 12:26 UTCEG score recompute
- 2026-08-18 12:24 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-203
- CVE-2019-10071EG 9.8EPSS p95CRITICAL
- CVE-2018-1000884EG 9.8CRITICAL
- CVE-2017-5753NVD 5.6EG 9.0EPSS p100CRITICAL
- CVE-2017-5715NVD 5.6EG 8.3EPSS p99HIGH
- CVE-2019-10233EG 8.1HIGH
- CVE-2018-9364EG 7.5HIGH
- CVE-2013-10006NVD 2.6EG 7.5HIGH
- CVE-2019-1020002EG 7.5HIGH
- CVE-2019-10114EG 7.5HIGH
- CVE-2017-13099NVD 5.9EG 7.5EPSS p98HIGH
Frequently asked(5)
What is CVE-2026-23931?
CVE-2026-23931 is a medium vulnerability published on August 18, 2026. The frontend validatate.api.exists action can be exploited by authenticated users to extract plaintext user macro values leading to potential loss of confidentiality.
When was CVE-2026-23931 disclosed?
CVE-2026-23931 was first published in the National Vulnerability Database on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23931 actively exploited?
CVE-2026-23931 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 79.6% of all scored CVEs.
What is the CVSS score of CVE-2026-23931?
CVE-2026-23931 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-23931?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23931, 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-2026-23931
Is Your Infrastructure Affected by CVE-2026-23931?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.