CVE-2026-74899

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.75% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 54.5% of scored records. A rank, not a probability.

NVD base score

9.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-08-28.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-17 11:04Z2 MO AGO

Last updated

2026-10-01 15:21Z28 DAYS AGO

Reserved

2026-08-17

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Critical (CVSS 9.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')Variant

Data version

5.2

Document digest

03c89f4cdfb5f55ac39f1eb90b9887f49c4617a157f2a146ddcb094a8b8b1b00

• github.comGitHub Security Advisory (GHSA-m25m-ggxg-239c)https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-m25m-ggxg-239cvendor-advisory
• www.vulncheck.comVulnCheck Advisory: openssl_encrypt before 1.4.0 Sandbox Escape via Type Hierarchyhttps://www.vulncheck.com/advisories/openssl-encrypt-before-sandbox-escape-via-type-hierarchythird-party-advisory
• github.comhttps://github.com/siyuan-note/siyuan/security/advisories/GHSA-43jx-gxq4-jpjcexploit