CVE-2026-42789

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited 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

0.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 25.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

Modified. NVD last modified this record on 2026-08-14.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

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

2026-05-27 12:23Z3 MO AGO

Last updated

2026-08-14 12:04Z21 DAYS AGO

Reserved

2026-04-29

Assigning CNA

EEF

Record state

PUBLISHED

Severity

High (CVSS 7.0)

CNA CVSS vector

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

Weaknesses

• CWE-295Improper Certificate ValidationBase
• CWE-296Improper Following of a Certificate's Chain of TrustBase

Data version

5.2

Document digest

9f05c0bf9338d7ea183b5bb247981c3afe3f6c925c5e5dd516af199d8e34d818

• github.comhttps://github.com/erlang/otp/security/advisories/GHSA-c99q-jmpx-v8qqvendor-advisoryrelated
• cna.erlef.orghttps://cna.erlef.org/cves/CVE-2026-42789.htmlrelated
• osv.devhttps://osv.dev/vulnerability/EEF-CVE-2026-42789related
• www.erlang.orghttps://www.erlang.org/doc/system/versions.html#order-of-versionsx_version-scheme
• github.comhttps://github.com/erlang/otp/commit/471cd2f664300a95353c467873800bbe706005dbpatch
• github.comhttps://github.com/erlang/otp/commit/59c8d824386b2eb1614ff9340624843ef6aca0fdpatch
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-42789vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2482093https://bugzilla.redhat.com/show_bug.cgi?id=2482093issue-trackingx_refsource_REDHAT
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42789.jsonx_sadp-csaf-vex
• access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:54757vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:39809vendor-advisoryx_refsource_REDHAT