CVE-2026-47078

MEDIUMPre-NVD 4.84.8
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 4.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: secondary
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 4.8Exploit: None knownExposed: 0

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

Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.

zip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter: .. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as ../x/y causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via add_cwd.

This vulnerability is associated with program file lib/stdlib/src/zip.erl.

This issue affects OTP from OTP 27.1 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15, corresponding to stdlib from 6.1 before 8.0.3, 7.3.0.1 and 6.2.2.4.

CVSS v3
4.8
EG Score
4.8(low)
EG Risk
22(Track)
EG Risk 22/100SSVC: 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
Severity48% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

July 27, 2026

Last Modified

July 27, 2026

Advisory Details (5)

Auto-updated Jul 27, 2026
Patch available. Sources: github, github_commit.
github_commit

commit 8a933c9c7835 (erlang/otp)

Fix landed in erlang/otp commit 8a933c9c7835 — awaiting tagged release

https://github.com/erlang/otp/commit/8a933c9c7835b06776d31d17b79b7336627d887a
generic

Versions — Erlang System Documentation v29.0.4

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

OSV - Open Source Vulnerabilities

https://osv.dev/vulnerability/EEF-CVE-2026-47078
generic

Relative path traversal in zip:unzip/zip:extract via check_dir_level depth-counter bypass | Erlang Ecosystem Foundation CNA

https://cna.erlef.org/cves/CVE-2026-47078.html
github Patch Available

Relative path traversal in zip:unzip via check_dir_level depth-counter bypass · Advisory · erlang/otp · GitHub

https://github.com/erlang/otp/security/advisories/GHSA-rf72-wp7h-jg3x

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 4× 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. 2026-07-27 19:30 UTCEG score recompute
  2. 2026-07-27 19:06 UTCEG score recompute
  3. 2026-07-27 15:31 UTCEG score recompute
  4. 2026-07-27 15:30 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-47078?
CVE-2026-47078 is a medium vulnerability published on July 27, 2026. Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive. zip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:checkdirlevel/2, which tracks directory depth as a running integer…
When was CVE-2026-47078 disclosed?
CVE-2026-47078 was first published in the National Vulnerability Database on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-47078?
CVE-2026-47078 has a CVSS v3 base score of 4.8 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-47078?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47078, 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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