CVE-2026-86735

MEDIUMPre-NVD 5.05.0—
EchelonGraph scoreHIGH confidence

Score 5.0 from GitHub Security Advisory published 2026-09-08. a secondary CVSS source baseline 5.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.0Exploit: None knownExposed: 0

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

snipe-it versions before 8.7.0 contain a server-side request forgery vulnerability in the ExternalUrl validation rule that fails to detect IPv6 transition addresses encoding private IPv4 targets. Attackers with super-admin privileges can configure webhook URLs using NAT64, 6to4, or Teredo transition addresses to bypass SSRF guards and access internal services or cloud metadata endpoints.

CVSS v3
5.0
EG Score
5.0(high)
EG Risk
23(Track)
EG Risk 23/100SSVC: 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
Severity50% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Sep 8, 2026
Patch available. Sources: github.
generic

snipe-it before 8.7.0 SSRF via IPv6 transition address bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/snipe-it-before-8.7.0-ssrf-via-ipv6-transition-address-bypass
github Patch Available

IPv6 transition address bypass of webhook URL SSRF guard · Advisory · grokability/snipe-it · GitHub

https://github.com/grokability/snipe-it/security/advisories/GHSA-5j6m-rr83-rpj7

Vendor Advisories for CVE-2026-86735(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 21× in last 7d / 37× 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. 2026-09-20 22:27 UTCEG score recompute
  2. 2026-09-20 22:27 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-19 21:54 UTCEG score recompute
  5. 2026-09-19 21:54 UTCGHSA enrichment
  6. 2026-09-18 21:21 UTCEG score recompute
  7. 2026-09-18 21:21 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-17 20:19 UTCEG score recompute
  10. 2026-09-17 20:19 UTCGHSA enrichment
  11. 2026-09-17 19:32 UTCEPSS rescore
  12. 2026-09-16 18:17 UTCEG score recompute
  13. 2026-09-16 18:17 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 17:04 UTCEG score recompute
  17. 2026-09-15 17:04 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-14 16:31 UTCEG score recompute
  21. 2026-09-14 16:31 UTCGHSA enrichment
  22. 2026-09-13 15:59 UTCGHSA enrichment
  23. 2026-09-12 15:26 UTCEG score recompute
  24. 2026-09-12 15:26 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 12 more
  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 14:51 UTCEG score recompute
  3. 2026-09-11 14:51 UTCGHSA enrichment
  4. 2026-09-10 14:18 UTCEG score recompute
  5. 2026-09-10 14:18 UTCGHSA enrichment
  6. 2026-09-09 13:46 UTCGHSA enrichment
  7. 2026-09-08 20:11 UTCEG score recompute
  8. 2026-09-08 20:11 UTCGHSA enrichment
  9. 2026-09-08 16:41 UTCEG score recompute
  10. 2026-09-08 15:50 UTCEG score recompute
  11. 2026-09-08 15:25 UTCEG score recompute
  12. 2026-09-08 15:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86735?
CVE-2026-86735 is a medium vulnerability published on September 8, 2026. snipe-it versions before 8.7.0 contain a server-side request forgery vulnerability in the ExternalUrl validation rule that fails to detect IPv6 transition addresses encoding private IPv4 targets. Attackers with super-admin privileges can configure webhook URLs using NAT64, 6to4, or Teredo…
When was CVE-2026-86735 disclosed?
CVE-2026-86735 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86735 actively exploited?
CVE-2026-86735 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 84.6% of all scored CVEs.
What is the CVSS score of CVE-2026-86735?
CVE-2026-86735 has a CVSS v3 base score of 5.0 (NVD).
How do I remediate CVE-2026-86735?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86735, 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-2026-86735

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