CVE-2026-42790

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 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

0.34% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 27.8% of scored records. A rank, not a probability.

NVD base score

7.6 (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:P/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

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 15:09Z5 MO AGO

Last updated

2026-09-18 12:04Z1 MO AGO

Reserved

2026-04-29

Assigning CNA

EEF

Record state

PUBLISHED

Severity

High (CVSS 7.6)

CNA CVSS vector

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

Weaknesses

• CWE-295Improper Certificate ValidationBase
• CWE-297Improper Validation of Certificate with Host MismatchVariant

Data version

5.2

Document digest

afbaebe189702bb0a94ed1e485276f0db5a6691a2e8dd19b4825ab47b573da35

• github.comhttps://github.com/erlang/otp/security/advisories/GHSA-22cw-4ph4-6447vendor-advisoryrelated
• cna.erlef.orghttps://cna.erlef.org/cves/CVE-2026-42790.htmlrelated
• osv.devhttps://osv.dev/vulnerability/EEF-CVE-2026-42790related
• www.erlang.orghttps://www.erlang.org/doc/system/versions.html#order-of-versionsx_version-scheme
• github.comhttps://github.com/erlang/otp/commit/0769050c69d73762672b0db1347b6993a5b31759patch
• github.comhttps://github.com/erlang/otp/commit/fb67c6d1836f51105a96d8b769e71e4215a79457patch
• github.comhttps://github.com/erlang/otp/commit/21abed64eb2026b5f82f432709e4e932f9be389apatch
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-42790vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2482286https://bugzilla.redhat.com/show_bug.cgi?id=2482286issue-trackingx_refsource_REDHAT
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42790.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