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VulnerabilityPublished Updated

CVE-2026-10841: IBM WebSphere Application Server · HTTP Request Smuggling

Affects IBM WebSphere Application ServerSource CVE Database V5

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Not known to be exploited · CVSS 4.8 Medium.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
4.8Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (ibm)CVSS 3.14.8
EPSS
0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
IBMWebSphere Application ServerAffected
  • =9.0
  • =8.5
Fixed in–
IBMWebSphere Application Server - LibertyAffected
  • >=17.0.0.3 <=26.0.0.5
Fixed in–

CPE configurations (6)

  • cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:websphere_application_server:9.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:websphere_application_server:8.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:websphere_application_server_liberty:17.0.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:websphere_application_server_liberty:26.0.0.8:*:*:*:*:*:*:*

AI-suggested

Organizations should monitor IBM advisories for updates and apply any official patches once available.

Description

CVE-2026-10841 is a medium severity vulnerability in IBM WebSphere Application Server versions 8.5, 9.0, Liberty 17.0.0.3 through 26.0.0.5, and version 10.1. It involves inconsistent interpretation of HTTP requests, known as HTTP request/response smuggling (CWE-444). This flaw could allow an attacker to manipulate HTTP request processing, potentially impacting confidentiality and integrity. The vulnerability has a CVSS 3.1 base score of 4.8, indicating a moderate risk. No known exploits are reported in the wild, and no patch or remediation details are provided in the available data.

References

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