CVE-2026-73270

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7%, top 50% 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
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.2Exploit: None knownExposed: 0

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

Improper Handling of Case Sensitivity vulnerability in Erlang/OTP inets httpd allows a remote unauthenticated attacker to read files inside a mod_auth protected directory by requesting them with different casing, on deployments whose filesystem is case-insensitive.

mod_auth:secret_path/3 decides whether a resolved filesystem path lies inside a protected directory block by running the configured directory path through re:run/3 without the caseless option. A request for /secret/file against a directory configured as /Secret therefore does not match, so the request is treated as unprotected and no authentication challenge is issued, while the filesystem resolves the differently cased path to the same file and mod_get serves it. Deployments on case-sensitive filesystems are unaffected, because there the filesystem itself rejects the mismatched casing.

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
8.2
EG Score
8.2(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity82% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 8, 2026

Advisory Details (7)

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

commit 9641944a2efb (erlang/otp)

Fix landed in erlang/otp commit 9641944a2efb — awaiting tagged release

https://github.com/erlang/otp/commit/9641944a2efbf55bea760f8ff7ba777fe3a0961c
github_commit

commit d8878dec0ece (erlang/otp)

Fix landed in erlang/otp commit d8878dec0ece — awaiting tagged release

https://github.com/erlang/otp/commit/d8878dec0ececc2eab18e47bb18b472f224ca633
github_commit

commit bac19eb3dbd9 (erlang/otp)

Fix landed in erlang/otp commit bac19eb3dbd9 — awaiting tagged release

https://github.com/erlang/otp/commit/bac19eb3dbd96cc49b6d8cabc1c04248bf8c79f6
generic

Versions — Erlang System Documentation v29.0.6

https://www.erlang.org/doc/system/versions.html#order-of-versions
generic

OSV - Open Source Vulnerabilities

https://osv.dev/vulnerability/EEF-CVE-2026-73270
generic

CVE-2026-73270

https://cna.erlef.org/cves/CVE-2026-73270.html
github Patch Available

Authentication Bypass via Case-Insensitive Filesystem Path Matching in httpd mod_auth · Advisory · erlang/otp · GitHub

https://github.com/erlang/otp/security/advisories/GHSA-mh78-93cr-jx8f

Vendor Advisories for CVE-2026-73270(1)

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 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(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 60× 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 04:32 UTCEG score recompute
  2. 2026-09-19 04:32 UTCVendor advisory
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 16:17 UTCVendor advisory
  5. 2026-09-18 03:53 UTCEG score recompute
  6. 2026-09-18 03:53 UTCVendor advisory
  7. 2026-09-17 15:40 UTCVendor advisory
  8. 2026-09-17 03:26 UTCVendor advisory
  9. 2026-09-16 15:12 UTCEG score recompute
  10. 2026-09-16 15:12 UTCVendor advisory
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-16 02:58 UTCVendor advisory
  14. 2026-09-15 14:44 UTCEG score recompute
  15. 2026-09-15 14:44 UTCVendor advisory
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 14:15 UTCVendor advisory
  18. 2026-09-14 02:02 UTCEG score recompute
  19. 2026-09-14 02:02 UTCVendor advisory
  20. 2026-09-13 13:48 UTCVendor advisory
  21. 2026-09-13 01:35 UTCEG score recompute
  22. 2026-09-13 01:35 UTCVendor advisory
  23. 2026-09-12 15:02 UTCEPSS rescore
  24. 2026-09-12 13:21 UTCVendor advisory
  25. 2026-09-12 01:08 UTCEG score recompute
Show 35 more
  1. 2026-09-12 01:08 UTCVendor advisory
  2. 2026-09-11 14:53 UTCEPSS rescore
  3. 2026-09-11 12:54 UTCEG score recompute
  4. 2026-09-10 12:06 UTCEG score recompute
  5. 2026-09-10 09:35 UTCEPSS rescore
  6. 2026-09-09 11:37 UTCVendor advisory
  7. 2026-09-08 23:23 UTCEG score recompute
  8. 2026-09-08 23:23 UTCVendor advisory
  9. 2026-09-08 22:01 UTCEPSS rescore
  10. 2026-09-08 01:28 UTCEG score recompute
  11. 2026-09-08 01:28 UTCVendor advisory
  12. 2026-09-08 01:15 UTCEG score recompute
  13. 2026-09-08 01:15 UTCVendor advisory
  14. 2026-09-07 14:55 UTCVendor advisory
  15. 2026-09-07 00:26 UTCEG score recompute
  16. 2026-09-07 00:26 UTCVendor advisory
  17. 2026-09-06 13:48 UTCEPSS rescore
  18. 2026-09-06 12:11 UTCVendor advisory
  19. 2026-09-05 23:53 UTCEG score recompute
  20. 2026-09-05 23:53 UTCVendor advisory
  21. 2026-09-05 11:40 UTCVendor advisory
  22. 2026-09-04 23:27 UTCEG score recompute
  23. 2026-09-04 23:27 UTCVendor advisory
  24. 2026-09-04 10:30 UTCEG score recompute
  25. 2026-09-04 10:30 UTCVendor advisory
  26. 2026-09-04 05:07 UTCEPSS rescore
  27. 2026-09-03 22:16 UTCVendor advisory
  28. 2026-09-03 10:02 UTCVendor advisory
  29. 2026-09-02 21:48 UTCEG score recompute
  30. 2026-09-02 14:12 UTCEPSS rescore
  31. 2026-09-01 16:25 UTCEG score recompute
  32. 2026-09-01 16:09 UTCEG score recompute
  33. 2026-09-01 15:39 UTCEG score recompute
  34. 2026-09-01 14:55 UTCEG score recompute
  35. 2026-09-01 14:53 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-73270?
CVE-2026-73270 is a high vulnerability published on September 1, 2026. Improper Handling of Case Sensitivity vulnerability in Erlang/OTP inets httpd allows a remote unauthenticated attacker to read files inside a mod_auth protected directory by requesting them with different casing, on deployments whose filesystem is case-insensitive. modauth:secretpath/3 decides…
When was CVE-2026-73270 disclosed?
CVE-2026-73270 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-2026-73270 actively exploited?
CVE-2026-73270 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.9% of all scored CVEs.
What is the CVSS score of CVE-2026-73270?
CVE-2026-73270 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-73270?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73270, 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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