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

0.38% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 32.0% 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 2026-10-26.

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 12:23Z5 MO AGO

Last updated

2026-10-14 16:55Z15 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

88055986490445844d6b38c27ea02db27c25aff240aa2ec06ca39511e62b20a8

• github.comGitHub Advisoryhttps://github.com/erlang/otp/security/advisories/GHSA-c99q-jmpx-v8qqrelatedvendor-advisory
• cna.erlef.orgEEF CNA record for CVE-2026-42789https://cna.erlef.org/cves/CVE-2026-42789.htmlrelated
• osv.devOSV record EEF-CVE-2026-42789https://osv.dev/vulnerability/EEF-CVE-2026-42789related
• www.erlang.orgErlang/OTP version orderinghttps://www.erlang.org/doc/system/versions.html#order-of-versionsx_version-scheme
• github.comFix commit 0a05b7c in erlang/otphttps://github.com/erlang/otp/commit/0a05b7ca33fb0b3f0a6cb9ae34252bb3a74032b8patch
• github.comFix commit 75ca4c0 in erlang/otphttps://github.com/erlang/otp/commit/75ca4c0dc2bbdb286ac3c3fe89cb4b4d2b4dc333patch
• github.comFix commit 82af606 in erlang/otphttps://github.com/erlang/otp/commit/82af606b5437c4de1276dbcc8855a47e88231226patch
• 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