CVE-2026-115693

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.26% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 18.7% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/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

Awaiting Analysis. NVD last modified this record on 2026-10-26.

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

2026-10-26 13:49Z2 DAYS AGO

Last updated

2026-10-26 13:49Z2 DAYS AGO

Reserved

2026-10-25

Assigning CNA

EEF

Record state

PUBLISHED

Severity

Critical (CVSS 9.1)

CNA CVSS vector

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

Weaknesses

• CWE-295Improper Certificate ValidationBase

Data version

5.2

Document digest

6a9cd36e831c16b8fed0aeaf8e1ed6c379a8035cac27168d358b7effcc0823a7

• github.comDrop the certifi partial_chain when the caller pins cacerts or cacertfile (benoitc/hackney#978)https://github.com/benoitc/hackney/pull/978related
• cna.erlef.orgEEF CNA record for CVE-2026-115693https://cna.erlef.org/cves/CVE-2026-115693.htmlrelated
• osv.devOSV record EEF-CVE-2026-115693https://osv.dev/vulnerability/EEF-CVE-2026-115693related
• github.comhackney 4.9.0 release noteshttps://github.com/benoitc/hackney/releases/tag/4.9.0vendor-advisoryrelated
• github.comIntroducing commit d8a9afc in benoitc/hackneyhttps://github.com/benoitc/hackney/commit/d8a9afcf5c3849904274e2eba1df56c63d1a1a0crelated
• github.comFix commit 915eb57 in benoitc/hackneyhttps://github.com/benoitc/hackney/commit/915eb5737e9c489d8fc22eec8cdae30e9b027be4patch