CVE-2026-74994

MEDIUMPre-NVD 6.06.0—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 70% 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
Trending — 3 sources updated this week
6.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.0Exploit: None knownExposed: 0

A fix is available — apply it.

The mod_auth module in OTP's inets httpd server, when configured with dets or mnesia authentication backends and multiple directory configuration blocks, collapses all directory blocks into a single shared user/group namespace. A user added to one protected directory is accepted as valid for all other protected directories on the same server instance.

This issue affects OTP from OTP 17.0 before OTP 27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.

CVSS v3
6.0
EG Score
6.0(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity60% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 8, 2026

Advisory Details (6)

Auto-updated Sep 1, 2026
Patch available. Sources: github, github_commit.
github_commit

commit 6101cb74ff28 (erlang/otp)

Fix landed in erlang/otp commit 6101cb74ff28 — awaiting tagged release

https://github.com/erlang/otp/commit/6101cb74ff2870718c622ba7af0c100f7f2524e3
github_commit

commit c5ccec8ed25c (erlang/otp)

Fix landed in erlang/otp commit c5ccec8ed25c — awaiting tagged release

https://github.com/erlang/otp/commit/c5ccec8ed25c70ec6557fd81277e4b2f52285c19
github_commit

commit 6982e381137e (erlang/otp)

Fix landed in erlang/otp commit 6982e381137e — awaiting tagged release

https://github.com/erlang/otp/commit/6982e381137ede21a4e1faf5fa2dd82321691176
generic

OSV - Open Source Vulnerabilities

https://osv.dev/vulnerability/EEF-CVE-2026-74994
generic

CVE-2026-74994

https://cna.erlef.org/cves/CVE-2026-74994.html
github Patch Available

Authentication Bypass via Directory Namespace Collapse in httpd mod_auth (dets/mnesia backends) · Advisory · erlang/otp · GitHub

https://github.com/erlang/otp/security/advisories/GHSA-c3cq-q8x6-547g

Vendor Advisories for CVE-2026-74994(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhaterlang27-main-27.3.4.17-0.1.hum12026-09-02redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
erlang1:25.2.3+dfsg-1 ... 1:29.0~rc3+dfsg-4 (79 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
erlang1:27.3.4.1+dfsg-1 ... 1:29.0~rc3+dfsg-4 (40 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
erlang1:27.3.4.1+dfsg-1 ... 1:29.0~rc3+dfsg-4 (37 versions)——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 48× 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. 2026-09-19 09:57 UTCEG score recompute
  2. 2026-09-19 09:57 UTCVendor advisory
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 08:50 UTCEG score recompute
  5. 2026-09-18 08:50 UTCVendor advisory
  6. 2026-09-17 08:13 UTCEG score recompute
  7. 2026-09-17 08:13 UTCVendor advisory
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 07:36 UTCEG score recompute
  10. 2026-09-16 07:36 UTCVendor advisory
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 06:57 UTCEG score recompute
  13. 2026-09-15 06:57 UTCVendor advisory
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-14 06:19 UTCEG score recompute
  16. 2026-09-14 06:19 UTCVendor advisory
  17. 2026-09-13 05:42 UTCEG score recompute
  18. 2026-09-13 05:42 UTCVendor advisory
  19. 2026-09-12 15:02 UTCEPSS rescore
  20. 2026-09-12 05:05 UTCEG score recompute
  21. 2026-09-12 05:05 UTCVendor advisory
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 04:28 UTCEG score recompute
  24. 2026-09-11 04:28 UTCVendor advisory
  25. 2026-09-10 09:35 UTCEPSS rescore
Show 23 more
  1. 2026-09-10 03:50 UTCVendor advisory
  2. 2026-09-09 03:13 UTCEG score recompute
  3. 2026-09-09 03:13 UTCVendor advisory
  4. 2026-09-08 22:01 UTCEPSS rescore
  5. 2026-09-08 02:35 UTCVendor advisory
  6. 2026-09-08 01:21 UTCEG score recompute
  7. 2026-09-08 01:21 UTCVendor advisory
  8. 2026-09-07 00:44 UTCEG score recompute
  9. 2026-09-07 00:44 UTCVendor advisory
  10. 2026-09-06 13:48 UTCEPSS rescore
  11. 2026-09-06 00:05 UTCEG score recompute
  12. 2026-09-06 00:05 UTCVendor advisory
  13. 2026-09-04 23:27 UTCEG score recompute
  14. 2026-09-04 23:27 UTCVendor advisory
  15. 2026-09-04 05:07 UTCEPSS rescore
  16. 2026-09-03 22:35 UTCVendor advisory
  17. 2026-09-02 21:58 UTCEG score recompute
  18. 2026-09-02 14:12 UTCEPSS rescore
  19. 2026-09-01 16:25 UTCEG score recompute
  20. 2026-09-01 16:09 UTCEG score recompute
  21. 2026-09-01 15:39 UTCEG score recompute
  22. 2026-09-01 14:56 UTCEG score recompute
  23. 2026-09-01 14:53 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-74994?
CVE-2026-74994 is a medium vulnerability published on September 1, 2026. The mod_auth module in OTP's inets httpd server, when configured with dets or mnesia authentication backends and multiple directory configuration blocks, collapses all directory blocks into a single shared user/group namespace. A user added to one protected directory is accepted as valid for all…
When was CVE-2026-74994 disclosed?
CVE-2026-74994 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74994 actively exploited?
CVE-2026-74994 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 69.8% of all scored CVEs.
What is the CVSS score of CVE-2026-74994?
CVE-2026-74994 has a CVSS v3 base score of 6.0 (NVD).
How do I remediate CVE-2026-74994?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74994, 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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