IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by an HTTP request smuggling vulnerability.
CVE-2026-11548
MEDIUMPre-NVD 4.84.8—Trending — 3 sources updated this week
EchelonGraph scoreHIGH confidence
Score 4.8 from GitHub Security Advisory published 2026-09-18. a secondary CVSS source baseline 4.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.8
- EG Score
- 4.8(high)
- EG Risk
- 22(Track)EG Risk 22/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity48% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 14%
- KEV
- Not listed
Published
September 18, 2026
Last Modified
September 19, 2026
Advisory Details (1)
Auto-updated Sep 18, 2026No patch confirmed yet.
generic
Security Bulletin: Multiple security vulnerabilities may affect IBM WebSphere Liberty that is shipped with IBM CICS TX Advanced.
https://www.ibm.com/support/pages/node/7287740Vendor Advisories for CVE-2026-11548(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-19 15:29 UTCEG score recompute
- 2026-09-19 15:29 UTCGHSA enrichment
- 2026-09-19 14:28 UTCEG score recompute
- 2026-09-19 14:28 UTCGHSA enrichment
- 2026-09-18 20:31 UTCEG score recompute
- 2026-09-18 19:19 UTCEG score recompute
- 2026-09-18 19:19 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-444
Frequently asked(5)
What is CVE-2026-11548?
CVE-2026-11548 is a medium vulnerability published on September 18, 2026. IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by an HTTP request smuggling vulnerability.
When was CVE-2026-11548 disclosed?
CVE-2026-11548 was first published in the National Vulnerability Database on September 18, 2026, with the most recent update on September 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11548 actively exploited?
CVE-2026-11548 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 86.0% of all scored CVEs.
What is the CVSS score of CVE-2026-11548?
CVE-2026-11548 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-11548?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11548, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-11548
Is Your Infrastructure Affected by CVE-2026-11548?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.