CVE-2026-40542

highpriority · track · 0EPSS 0.005 · 45 %ileDEEUFRUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.54% (45th) EPSS

CVSS 7.3 · high

Is it mine?

6 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCRAM-SHA-256 authentication without proper mutual authentication verification. Users are recommended to upgrade to version 5.6.1, which fixes this issue.

cvss

Technical severity, 0–10. One row per scoring source.

7.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · ENISA EU

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondaryexploitability 3.9 · impact 3.4

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · OSV

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-304USCWE-304USCWE-325US

affected products (6)

Products and version ranges known to be affected.

Siebel CRMall versionscert_bundDEcpe:/a:oracle:siebel_crm:17.0-26.9
Siebel CRMall versionscert_bundDEcpe:/a:oracle:siebel_crm:22.3-26.9
Siebel CRMall versionscert_bundDEcpe:/a:oracle:siebel_crm:25.12-26.9
Apache Software Foundation Apache HttpClient5.6 → 5.6.1enisa_euvdEU
apache httpclient= 5.6nvdUScpe:2.3:a:apache:httpclient:*:*:*:*:*:*:*:*
Maven org.apache.httpcomponents.client5:httpclient55.6-alpha1 → 5.6.1osvUSpkg:maven/org.apache.httpcomponents.client5/httpclient5

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-4084Oracle Siebel CRM: Mehrere SchwachstellenDeutsch2026-10-20csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Siebel CRM ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.
GHSA-v468-qcjx-r72wApache HttpClient accepts SCRAM-SHA-256 authentication without proper mutual authentication verification2026-04-22ghsa · osvUS
Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCRAM-SHA-256 authentication without proper mutual authentication verification. Users are recommended to upgrade to version 5.6.1, which fixes this issue.
CERTFR-2026-AVI-1349Multiples vulnérabilités dans Oracle Database ServerFrançais2026-10-21vendor · certfrFR

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv certfr NVD CVE.org MITRE

published 2026-04-22modified 2026-10-26

references (19)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan