CVE-2026-49436

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 83% 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
Elevated
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: Elevated riskExposed: 0

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

LinkAce is a self-hosted archive to collect website links. Prior to version 2.5.7, the Bulk Link API endpoint (POST /api/v2/bulk/links) accepts URLs without any format validation, allowing an authenticated user to store a javascript: URI. The stored URI is later rendered verbatim as an href in Blade templates, and clicking it executes arbitrary JavaScript in the victim's browser — exfiltrating cookies and session tokens. Version 2.5.7 fixes the issue.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
49(Track*)
EG Risk 49/100SSVC: 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
Severity73% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

August 20, 2026

Last Modified

August 21, 2026

Advisory Details (2)

Auto-updated Aug 20, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
github_commit Patch Available

commit 642ac5203472 (Kovah/LinkAce)

Patch available: Kovah/LinkAce v2.5.7 (contains commit 642ac5203472)

https://github.com/Kovah/LinkAce/commit/642ac520347205a8277668bcae269bdc21223eae
github Patch Available🟡 PoC Available

Stored XSS via 'javascript:' URI in Bulk Link API · Advisory · Kovah/LinkAce · GitHub

https://github.com/Kovah/LinkAce/security/advisories/GHSA-6r73-pchm-4m39

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 19× 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 01:22 UTCEPSS rescore
  2. 2026-08-29 07:08 UTCEG score recompute
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-27 15:28 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-27 02:26 UTCEG score recompute
  7. 2026-08-26 14:46 UTCEPSS rescore
  8. 2026-08-26 00:24 UTCEG score recompute
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-24 22:21 UTCEG score recompute
  11. 2026-08-23 07:23 UTCEG score recompute
  12. 2026-08-23 00:19 UTCEPSS rescore
  13. 2026-08-22 05:22 UTCEG score recompute
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 16:22 UTCEG score recompute
  16. 2026-08-21 15:56 UTCEG score recompute
  17. 2026-08-20 22:24 UTCEG score recompute
  18. 2026-08-20 21:57 UTCEG score recompute
  19. 2026-08-20 21:56 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-49436?
CVE-2026-49436 is a high vulnerability published on August 20, 2026. LinkAce is a self-hosted archive to collect website links. Prior to version 2.5.7, the Bulk Link API endpoint (POST /api/v2/bulk/links) accepts URLs without any format validation, allowing an authenticated user to store a javascript: URI. The stored URI is later rendered verbatim as an href in…
When was CVE-2026-49436 disclosed?
CVE-2026-49436 was first published in the National Vulnerability Database on August 20, 2026, with the most recent update on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49436 actively exploited?
CVE-2026-49436 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 83.1% of all scored CVEs.
What is the CVSS score of CVE-2026-49436?
CVE-2026-49436 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-49436?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49436, 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-2026-49436

Explore →

Is Your Infrastructure Affected by CVE-2026-49436?

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

Start Free Scan →Browse All CVEs