CVE-2026-84697

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-09-02. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
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.

Mailpit's IsInternalIP deny list function fails to block the Azure WireServer address 168.63.129.16 and the RFC 2765/6145 IPv4-translated IPv6 prefix, allowing server-side request forgery to internal destinations. Attackers can supply hostnames resolving to these addresses in message content to reach the link check API and proxy endpoint for accessing internal resources.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 10, 2026

Advisory Details (4)

Auto-updated Sep 2, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Mailpit SSRF Deny List Bypass via Azure Metadata and IPv6 Prefix | Advisories | VulnCheck

https://www.vulncheck.com/advisories/mailpit-ssrf-deny-list-bypass-via-azure-metadata-and-ipv6-prefix
github_commit

commit a02821bf3424 (axllent/mailpit)

Fix landed in axllent/mailpit commit a02821bf3424 — awaiting tagged release

https://github.com/axllent/mailpit/commit/a02821bf3424da9196e156c422370f4868a1dff2
generic

mailpit/internal/tools/net.go at v1.31.0 · axllent/mailpit · GitHub

https://github.com/axllent/mailpit/blob/v1.31.0/internal/tools/net.go
generic

GitHub - axllent/mailpit: An email and SMTP testing tool with API for developers · GitHub

https://github.com/axllent/mailpit

Vendor Advisories for CVE-2026-84697(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 23× in last 7d / 57× 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. 2026-09-21 08:52 UTCEG score recompute
  2. 2026-09-21 08:52 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 09:19 UTCEG score recompute
  5. 2026-09-20 09:19 UTCGHSA enrichment
  6. 2026-09-19 09:57 UTCEG score recompute
  7. 2026-09-19 09:57 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 10:28 UTCEG score recompute
  10. 2026-09-18 10:28 UTCGHSA enrichment
  11. 2026-09-17 19:32 UTCEPSS rescore
  12. 2026-09-17 11:10 UTCEG score recompute
  13. 2026-09-17 11:10 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 11:52 UTCEG score recompute
  16. 2026-09-16 11:52 UTCGHSA enrichment
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-15 12:33 UTCEG score recompute
  19. 2026-09-15 12:33 UTCGHSA enrichment
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-15 03:12 UTCEPSS rescore
  22. 2026-09-14 13:14 UTCEG score recompute
  23. 2026-09-14 13:14 UTCGHSA enrichment
  24. 2026-09-13 13:56 UTCEG score recompute
  25. 2026-09-13 13:56 UTCGHSA enrichment
Show 32 more
  1. 2026-09-12 14:38 UTCGHSA enrichment
  2. 2026-09-11 15:19 UTCEG score recompute
  3. 2026-09-11 15:19 UTCGHSA enrichment
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-10 16:01 UTCGHSA enrichment
  7. 2026-09-10 10:06 UTCEG score recompute
  8. 2026-09-10 10:06 UTCGHSA enrichment
  9. 2026-09-09 10:47 UTCEG score recompute
  10. 2026-09-09 10:47 UTCGHSA enrichment
  11. 2026-09-08 22:01 UTCEPSS rescore
  12. 2026-09-08 11:29 UTCEG score recompute
  13. 2026-09-08 11:29 UTCGHSA enrichment
  14. 2026-09-07 12:09 UTCEG score recompute
  15. 2026-09-07 12:09 UTCGHSA enrichment
  16. 2026-09-06 13:48 UTCEPSS rescore
  17. 2026-09-06 12:50 UTCEG score recompute
  18. 2026-09-06 12:50 UTCGHSA enrichment
  19. 2026-09-05 15:31 UTCEPSS rescore
  20. 2026-09-05 13:31 UTCGHSA enrichment
  21. 2026-09-04 14:10 UTCEG score recompute
  22. 2026-09-04 14:10 UTCGHSA enrichment
  23. 2026-09-04 05:07 UTCEPSS rescore
  24. 2026-09-03 14:51 UTCGHSA enrichment
  25. 2026-09-02 15:31 UTCEG score recompute
  26. 2026-09-02 15:31 UTCGHSA enrichment
  27. 2026-09-02 14:46 UTCEG score recompute
  28. 2026-09-02 14:46 UTCGHSA enrichment
  29. 2026-09-02 14:12 UTCEPSS rescore
  30. 2026-09-02 01:25 UTCEG score recompute
  31. 2026-09-02 01:12 UTCEG score recompute
  32. 2026-09-02 01:10 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84697?
CVE-2026-84697 is a medium vulnerability published on September 2, 2026. Mailpit's IsInternalIP deny list function fails to block the Azure WireServer address 168.63.129.16 and the RFC 2765/6145 IPv4-translated IPv6 prefix, allowing server-side request forgery to internal destinations. Attackers can supply hostnames resolving to these addresses in message content to…
When was CVE-2026-84697 disclosed?
CVE-2026-84697 was first published in the National Vulnerability Database on September 2, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84697 actively exploited?
CVE-2026-84697 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 84.0% of all scored CVEs.
What is the CVSS score of CVE-2026-84697?
CVE-2026-84697 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-84697?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84697, 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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