CVE-2026-74883

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-17. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: Elevated riskExposed: 0

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

openssl_encrypt versions before 1.4.0 contain a sandbox bypass vulnerability where the plugin sandbox fails to restrict alternative file access methods like pathlib.Path and io.open. Attackers can import pathlib or io modules to read and write arbitrary files, completely bypassing the restricted_open file access controls.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
71(Attend)
EG Risk 71/100SSVC: Attend

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
Severity88% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 17, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

openssl_encrypt before 1.4.0 Sandbox Bypass via pathlib and io | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-sandbox-bypass-via-pathlib-and-io
github Patch Available🟡 PoC Available

pathlib.Path and io.open bypass sandbox builtins.open restriction · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-mcjj-qw7m-j3cp

Vendor Advisories for CVE-2026-74883(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 22× in last 7d / 22× 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. 2026-08-21 05:35 UTCEG score recompute
  2. 2026-08-21 05:35 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 18:35 UTCGHSA enrichment
  5. 2026-08-20 07:36 UTCGHSA enrichment
  6. 2026-08-19 20:36 UTCEG score recompute
  7. 2026-08-19 20:36 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 09:35 UTCGHSA enrichment
  10. 2026-08-18 22:33 UTCEG score recompute
  11. 2026-08-18 22:33 UTCGHSA enrichment
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 11:34 UTCGHSA enrichment
  15. 2026-08-18 00:34 UTCGHSA enrichment
  16. 2026-08-17 13:30 UTCEG score recompute
  17. 2026-08-17 13:30 UTCGHSA enrichment
  18. 2026-08-17 12:56 UTCEG score recompute
  19. 2026-08-17 12:56 UTCGHSA enrichment
  20. 2026-08-17 11:39 UTCEG score recompute
  21. 2026-08-17 11:13 UTCEG score recompute
  22. 2026-08-17 11:12 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74883?
CVE-2026-74883 is a high vulnerability published on August 17, 2026. opensslencrypt versions before 1.4.0 contain a sandbox bypass vulnerability where the plugin sandbox fails to restrict alternative file access methods like pathlib.Path and io.open. Attackers can import pathlib or io modules to read and write arbitrary files, completely bypassing the restrictedopen…
When was CVE-2026-74883 disclosed?
CVE-2026-74883 was first published in the National Vulnerability Database on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74883 actively exploited?
CVE-2026-74883 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 82.5% of all scored CVEs.
What is the CVSS score of CVE-2026-74883?
CVE-2026-74883 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-74883?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74883, 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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