CVE-2026-72761

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 71% 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
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.9Exploit: None knownExposed: 0

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

The webhook URL validator in website/notifications/webhooks.py uses ip.is_global to reject non-public addresses after DNS resolution. IPv6 transition addresses (NAT64 64:ff9b::/96, 6to4 2002::/16, Teredo 2001:0000::/32) are classified as globally routable by IANA, so is_global returns True even when the embedded IPv4 targets a private, loopback, or cloud metadata destination. An attacker can register a webhook pointing at a hostname that resolves to a transition address to bypass the SSRF guard and exfiltrate vulnerability data to an internal endpoint.

The vulnerability was introduced on a non-release version. The fix was already done on HEAD. It only affects

organisation running the HEAD.

CVSS v3
6.9
EG Score
6.9(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity69% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 26, 2026

Advisory Details (1)

Auto-updated Aug 10, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit f3e0c6899c5b (vulnerability-lookup/vulnerability-lookup)

Fix landed in vulnerability-lookup/vulnerability-lookup commit f3e0c6899c5b — awaiting tagged release

https://github.com/vulnerability-lookup/vulnerability-lookup/commit/f3e0c6899c5b3823dcfd860fc6cb3edbedc9bf65

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 39× 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 09:58 UTCEG score recompute
  3. 2026-08-28 21:42 UTCEPSS rescore
  4. 2026-08-27 19:42 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-26 17:28 UTCEG score recompute
  7. 2026-08-26 14:47 UTCEPSS rescore
  8. 2026-08-26 06:38 UTCEG score recompute
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-25 05:25 UTCEG score recompute
  11. 2026-08-23 03:43 UTCEG score recompute
  12. 2026-08-23 00:19 UTCEPSS rescore
  13. 2026-08-22 02:51 UTCEG score recompute
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 01:59 UTCEG score recompute
  16. 2026-08-20 22:56 UTCEPSS rescore
  17. 2026-08-20 01:07 UTCEG score recompute
  18. 2026-08-19 17:04 UTCEPSS rescore
  19. 2026-08-19 00:15 UTCEG score recompute
  20. 2026-08-18 13:49 UTCEPSS rescore
  21. 2026-08-18 13:49 UTCEPSS rescore
  22. 2026-08-17 23:24 UTCEG score recompute
  23. 2026-08-17 13:47 UTCEPSS rescore
  24. 2026-08-16 22:32 UTCEG score recompute
  25. 2026-08-16 14:56 UTCEPSS rescore
Show 14 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 02:15 UTCEPSS rescore
  3. 2026-08-15 21:41 UTCEG score recompute
  4. 2026-08-15 01:31 UTCEPSS rescore
  5. 2026-08-14 20:49 UTCEG score recompute
  6. 2026-08-13 22:00 UTCEPSS rescore
  7. 2026-08-12 19:05 UTCEG score recompute
  8. 2026-08-12 13:51 UTCEPSS rescore
  9. 2026-08-11 18:14 UTCEG score recompute
  10. 2026-08-10 17:22 UTCEG score recompute
  11. 2026-08-10 17:10 UTCEG score recompute
  12. 2026-08-10 15:29 UTCEG score recompute
  13. 2026-08-10 14:35 UTCEG score recompute
  14. 2026-08-10 14:34 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-72761?
CVE-2026-72761 is a medium vulnerability published on August 10, 2026. The webhook URL validator in website/notifications/webhooks.py uses ip.is_global to reject non-public addresses after DNS resolution. IPv6 transition addresses (NAT64 64:ff9b::/96, 6to4 2002::/16, Teredo 2001:0000::/32) are classified as globally routable by IANA, so is_global returns True even…
When was CVE-2026-72761 disclosed?
CVE-2026-72761 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72761 actively exploited?
CVE-2026-72761 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 71.0% of all scored CVEs.
What is the CVSS score of CVE-2026-72761?
CVE-2026-72761 has a CVSS v3 base score of 6.9 (NVD).
How do I remediate CVE-2026-72761?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72761, 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

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