CVE-2026-23942

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 88% 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, nvd
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

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

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP (ssh_sftpd module) allows Path Traversal.

This vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl and program routines ssh_sftpd:is_within_root/2.

The SFTP server uses string prefix matching via lists:prefix/2 rather than proper path component validation when checking if a path is within the configured root directory. This allows authenticated users to access sibling directories that share a common name prefix with the configured root directory. For example, if root is set to /home/user1, paths like /home/user10 or /home/user1_backup would incorrectly be considered within the root.

This issue affects OTP from OTP 17.0 until OTP 28.4.1, OTP 27.3.4.9 and OTP 26.2.5.18, corresponding to ssh from 3.0.1 until 5.5.1, 5.2.11.6 and 5.1.4.14.

CVSS v3
5.4
EG Score
5.4(medium)
EPSS
28.5%
KEV
Not listed

Published

March 13, 2026

Last Modified

May 21, 2026

References (7)

Vendor Advisories for CVE-2026-23942(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 11× in last 7d / 49× 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 114 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
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  11. 2026-07-09 19:10 UTCEPSS rescore
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  24. 2026-06-30 23:22 UTCEPSS rescore
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  1. 2026-06-29 07:02 UTCOSV refresh
  2. 2026-06-28 14:07 UTCEPSS rescore
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  4. 2026-06-28 04:56 UTCEPSS rescore
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  11. 2026-06-23 21:33 UTCEPSS rescore
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  26. 2026-06-14 23:18 UTCEPSS rescore
  27. 2026-06-13 23:00 UTCEPSS rescore
  28. 2026-06-12 23:12 UTCEPSS rescore
  29. 2026-06-12 23:12 UTCEPSS rescore
  30. 2026-06-12 00:13 UTCEG score recompute
  31. 2026-06-12 00:13 UTCVendor advisory
  32. 2026-06-11 14:00 UTCEPSS rescore
  33. 2026-06-10 22:18 UTCEPSS rescore
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  35. 2026-06-10 18:21 UTCEG score recompute
  36. 2026-06-10 18:21 UTCVendor advisory
  37. 2026-06-10 13:22 UTCEPSS rescore
  38. 2026-06-09 16:53 UTCEG score recompute
  39. 2026-06-09 16:53 UTCVendor advisory
  40. 2026-06-08 14:17 UTCEPSS rescore
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  42. 2026-06-07 15:25 UTCEPSS rescore
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  44. 2026-06-07 15:25 UTCEPSS rescore
  45. 2026-06-07 14:51 UTCEG score recompute▲ 5.40
  46. 2026-06-07 14:51 UTCVendor advisory
  47. 2026-06-06 13:47 UTCEPSS rescore
  48. 2026-06-06 13:47 UTCEPSS rescore
  49. 2026-06-05 22:47 UTCEPSS rescore
  50. 2026-06-05 06:10 UTCEPSS rescore
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  60. 2026-06-01 09:43 UTCOSV refresh
  61. 2026-05-31 22:30 UTCEPSS rescore
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  63. 2026-05-31 00:16 UTCEPSS rescore
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  74. 2026-05-26 13:44 UTCEPSS rescore
  75. 2026-05-26 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-23942?
CVE-2026-23942 is a medium vulnerability published on March 13, 2026. Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP (ssh_sftpd module) allows Path Traversal. This vulnerability is associated with program files lib/ssh/src/sshsftpd.erl and program routines sshsftpd:iswithinroot/2. The SFTP server uses string…
When was CVE-2026-23942 disclosed?
CVE-2026-23942 was first published in the National Vulnerability Database on March 13, 2026, with the most recent update on May 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23942 actively exploited?
CVE-2026-23942 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 28.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-23942?
CVE-2026-23942 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-23942?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23942, 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.

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