CVE-2026-70367

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-08-04. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.4Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

A Server-Side Request Forgery (SSRF) bypass vulnerability exists in “stunnel” 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses (e.g., “::ffff:127.0.0.1”) or unspecified addresses ("0.0.0.0", "::"), enabling access to loopback-only services on the "stunnel" host that should not be network-reachable.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
16th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 4, 2026

Last Modified

August 6, 2026

Advisory Details (2)

Auto-updated Aug 4, 2026
Patch available. Sources: redhat.
redhat

2462083 – (CVE-2026-70367) CVE-2026-70367 stunnel: SSRF bypass in stunnel SOCKS proxy via IPv4-mapped IPv6 loopback and unspecified addresses allows access to loopback-only services

https://bugzilla.redhat.com/show_bug.cgi?id=2462083
redhat Patch Available

CVE-2026-70367 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-70367

Vendor Advisories for CVE-2026-70367(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
stunnel43:5.68-2 ... 3:5.78-2 (15 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
stunnel43:5.74-2, 3:5.76-1, 3:5.77-1, 3:5.78-1, 3:5.78-2
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
stunnel2:3.26-10 ... 3:5.79-2 (20 versions)
  • every version up to 3:5.80-1: fixed in 3:5.80-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 69× 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.

Showing the most recent 100 of 156 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 06:14 UTCEG score recompute
  3. 2026-10-04 06:14 UTCVendor advisory
  4. 2026-10-04 06:14 UTCGHSA enrichment
  5. 2026-10-03 14:26 UTCEPSS rescore
  6. 2026-10-02 17:56 UTCEPSS rescore
  7. 2026-10-02 10:13 UTCEG score recompute
  8. 2026-10-02 10:13 UTCVendor advisory
  9. 2026-10-02 10:12 UTCGHSA enrichment
  10. 2026-10-01 19:50 UTCEPSS rescore
  11. 2026-10-01 02:28 UTCEG score recompute
  12. 2026-10-01 02:28 UTCVendor advisory
  13. 2026-10-01 02:28 UTCGHSA enrichment
  14. 2026-09-30 15:03 UTCEPSS rescore
  15. 2026-09-29 06:27 UTCEG score recompute
  16. 2026-09-29 06:27 UTCVendor advisory
  17. 2026-09-29 06:27 UTCGHSA enrichment
  18. 2026-09-28 13:52 UTCEPSS rescore
  19. 2026-09-27 18:05 UTCEG score recompute
  20. 2026-09-27 18:05 UTCVendor advisory
  21. 2026-09-27 18:05 UTCGHSA enrichment
  22. 2026-09-27 13:48 UTCEPSS rescore
  23. 2026-09-26 15:59 UTCEPSS rescore
  24. 2026-09-25 10:18 UTCEG score recompute
  25. 2026-09-25 10:18 UTCGHSA enrichment
Show 75 more
  1. 2026-09-24 08:12 UTCEG score recompute
  2. 2026-09-24 08:12 UTCGHSA enrichment
  3. 2026-09-23 17:54 UTCEPSS rescore
  4. 2026-09-23 05:33 UTCEG score recompute
  5. 2026-09-23 05:33 UTCGHSA enrichment
  6. 2026-09-22 03:27 UTCEG score recompute
  7. 2026-09-22 03:27 UTCGHSA enrichment
  8. 2026-09-21 21:09 UTCEPSS rescore
  9. 2026-09-20 20:53 UTCEG score recompute
  10. 2026-09-20 20:53 UTCGHSA enrichment
  11. 2026-09-20 20:16 UTCEPSS rescore
  12. 2026-09-19 13:29 UTCEG score recompute
  13. 2026-09-19 13:28 UTCGHSA enrichment
  14. 2026-09-18 19:28 UTCEPSS rescore
  15. 2026-09-18 10:21 UTCEG score recompute
  16. 2026-09-18 10:21 UTCGHSA enrichment
  17. 2026-09-17 08:15 UTCEG score recompute
  18. 2026-09-17 08:15 UTCGHSA enrichment
  19. 2026-09-16 14:08 UTCEPSS rescore
  20. 2026-09-16 05:16 UTCEG score recompute
  21. 2026-09-16 05:16 UTCGHSA enrichment
  22. 2026-09-16 05:15 UTCEPSS rescore
  23. 2026-09-15 03:12 UTCEPSS rescore
  24. 2026-09-15 01:41 UTCGHSA enrichment
  25. 2026-09-13 19:33 UTCEG score recompute
  26. 2026-09-13 19:33 UTCGHSA enrichment
  27. 2026-09-12 16:59 UTCEG score recompute
  28. 2026-09-12 16:59 UTCGHSA enrichment
  29. 2026-09-12 15:02 UTCEPSS rescore
  30. 2026-09-11 14:53 UTCEPSS rescore
  31. 2026-09-11 14:52 UTCEG score recompute
  32. 2026-09-11 14:52 UTCGHSA enrichment
  33. 2026-09-10 09:35 UTCEPSS rescore
  34. 2026-09-10 08:48 UTCGHSA enrichment
  35. 2026-09-09 06:38 UTCEG score recompute
  36. 2026-09-09 06:38 UTCGHSA enrichment
  37. 2026-09-08 22:01 UTCEPSS rescore
  38. 2026-09-07 18:37 UTCEG score recompute
  39. 2026-09-07 18:37 UTCGHSA enrichment
  40. 2026-09-07 16:01 UTCEPSS rescore
  41. 2026-09-06 13:47 UTCEPSS rescore
  42. 2026-09-06 06:28 UTCEG score recompute
  43. 2026-09-06 06:28 UTCGHSA enrichment
  44. 2026-09-05 15:31 UTCEPSS rescore
  45. 2026-09-05 04:12 UTCEG score recompute
  46. 2026-09-05 04:12 UTCGHSA enrichment
  47. 2026-09-04 05:07 UTCEPSS rescore
  48. 2026-09-03 17:32 UTCEG score recompute
  49. 2026-09-03 17:32 UTCGHSA enrichment
  50. 2026-09-02 14:12 UTCEPSS rescore
  51. 2026-09-02 07:46 UTCEG score recompute
  52. 2026-09-02 07:46 UTCGHSA enrichment
  53. 2026-09-01 13:54 UTCEPSS rescore
  54. 2026-09-01 02:53 UTCGHSA enrichment
  55. 2026-08-30 23:55 UTCEG score recompute
  56. 2026-08-30 23:55 UTCGHSA enrichment
  57. 2026-08-30 19:17 UTCEPSS rescore
  58. 2026-08-30 01:22 UTCEPSS rescore
  59. 2026-08-29 21:49 UTCEG score recompute
  60. 2026-08-29 21:49 UTCGHSA enrichment
  61. 2026-08-28 21:42 UTCEPSS rescore
  62. 2026-08-27 09:40 UTCEG score recompute
  63. 2026-08-27 09:40 UTCGHSA enrichment
  64. 2026-08-26 14:47 UTCEPSS rescore
  65. 2026-08-26 07:34 UTCEG score recompute
  66. 2026-08-26 07:33 UTCGHSA enrichment
  67. 2026-08-25 13:49 UTCEPSS rescore
  68. 2026-08-25 05:27 UTCEG score recompute
  69. 2026-08-25 05:27 UTCGHSA enrichment
  70. 2026-08-24 03:21 UTCGHSA enrichment
  71. 2026-08-23 01:15 UTCEG score recompute
  72. 2026-08-23 01:15 UTCGHSA enrichment
  73. 2026-08-21 23:49 UTCEPSS rescore
  74. 2026-08-21 23:09 UTCEG score recompute
  75. 2026-08-21 23:09 UTCGHSA enrichment

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-70367?
CVE-2026-70367 is a medium vulnerability published on August 4, 2026. A Server-Side Request Forgery (SSRF) bypass vulnerability exists in “stunnel” 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses (e.g., “::ffff:127.0.0.1”) or unspecified addresses ("0.0.0.0",…
When was CVE-2026-70367 disclosed?
CVE-2026-70367 was first published on August 4, 2026, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70367 actively exploited?
CVE-2026-70367 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70367?
CVE-2026-70367 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-70367?
A fix for CVE-2026-70367 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70367 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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