CVE-2026-74876

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-17. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 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 vulnerability in PublicKeyBundle.from_dict() that creates key bundles from untrusted data without verifying signatures. Attackers can call from_dict() followed by to_identity() without signature verification to encrypt data using attacker-controlled public keys, leaking secrets.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 17, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
Patch available. Sources: github.
generic

openssl_encrypt before 1.4.0 Unverified Key Bundle Encryption | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-unverified-key-bundle-encryption
github Patch Available

Unverified key bundle from_dict() + to_identity() path allows encryption to attacker keys · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-8h88-gxp3-j7pg

Vendor Advisories for CVE-2026-74876(1)

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

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
openssl-encrypt0.2.2 ... 1.4.0b8 (44 versions)1.4.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 37× in last 7d / 37× 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 04:03 UTCGHSA enrichment
  2. 2026-08-21 00:07 UTCEG score recompute
  3. 2026-08-21 00:06 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 20:10 UTCGHSA enrichment
  6. 2026-08-20 16:14 UTCGHSA enrichment
  7. 2026-08-20 12:18 UTCGHSA enrichment
  8. 2026-08-20 08:22 UTCGHSA enrichment
  9. 2026-08-20 04:27 UTCGHSA enrichment
  10. 2026-08-20 00:31 UTCGHSA enrichment
  11. 2026-08-19 20:35 UTCEG score recompute
  12. 2026-08-19 20:35 UTCGHSA enrichment
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 16:39 UTCGHSA enrichment
  15. 2026-08-19 12:40 UTCGHSA enrichment
  16. 2026-08-19 08:44 UTCGHSA enrichment
  17. 2026-08-19 04:48 UTCGHSA enrichment
  18. 2026-08-19 00:52 UTCGHSA enrichment
  19. 2026-08-18 20:54 UTCGHSA enrichment
  20. 2026-08-18 16:59 UTCEG score recompute
  21. 2026-08-18 16:59 UTCGHSA enrichment
  22. 2026-08-18 13:49 UTCEPSS rescore
  23. 2026-08-18 13:49 UTCEPSS rescore
  24. 2026-08-18 12:14 UTCGHSA enrichment
  25. 2026-08-18 08:16 UTCGHSA enrichment
Show 12 more
  1. 2026-08-18 04:16 UTCGHSA enrichment
  2. 2026-08-18 00:17 UTCGHSA enrichment
  3. 2026-08-17 20:19 UTCGHSA enrichment
  4. 2026-08-17 16:23 UTCEG score recompute
  5. 2026-08-17 16:23 UTCGHSA enrichment
  6. 2026-08-17 16:10 UTCEG score recompute
  7. 2026-08-17 16:10 UTCGHSA enrichment
  8. 2026-08-17 15:35 UTCEG score recompute
  9. 2026-08-17 15:35 UTCGHSA enrichment
  10. 2026-08-17 11:39 UTCEG score recompute
  11. 2026-08-17 11:13 UTCEG score recompute
  12. 2026-08-17 11:12 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-74876?
CVE-2026-74876 is a critical vulnerability published on August 17, 2026. opensslencrypt versions before 1.4.0 contain a vulnerability in PublicKeyBundle.fromdict() that creates key bundles from untrusted data without verifying signatures. Attackers can call fromdict() followed by toidentity() without signature verification to encrypt data using attacker-controlled…
When was CVE-2026-74876 disclosed?
CVE-2026-74876 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-2026-74876 actively exploited?
CVE-2026-74876 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 89.6% of all scored CVEs.
What is the CVSS score of CVE-2026-74876?
CVE-2026-74876 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-74876?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74876, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-74876

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