CVE-2026-48801: DoS (Denial of Service) linkify-it Dependency in Jira Service Management Data Center
CVE-2026-48801 key facts
- CISA KEV
- Not listed (catalogue checked )
- Highest advisory rating
- High
- CVSS base score
- 8.7 (Atlassian), 7.5 (Red Hat)
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H(Red Hat)
- Weakness
- CWE-1333
- Fixed releases
- Atlassian: Jira Service Management Data Center and Server: 11.3.11 (LTS) recommended Data Center Only, Jira Service Management Data Center and Server: 10.3.25 (LTS) Data Center Only
- Red Hat: 5.0.1, rh-podman-desktop-0:1.1.2-1.el10_2, ansible-automation-platform/automation-portal:1785854226, ansible-automation-platform/automation-portal:1784622951, ansible-automation-platform/bootc-automation-portal-rhel9:1786006573, rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend:1785332825 and 44 more in the advisory
- Listed by VulniPulse
- Record changed
Ratings, versions and fixes are quoted from the vendor advisories that cover only CVE-2026-48801; each belongs to its advisory, not to every product listed. How records are collected and checked.
How do I fix CVE-2026-48801?
Upgrade to a fixed release named by the vendor:
- Atlassian: Jira Service Management Data Center and Server: 11.3.11 (LTS) recommended Data Center Only, Jira Service Management Data Center and Server: 10.3.25 (LTS) Data Center Only
- Red Hat: 5.0.1, rh-podman-desktop-0:1.1.2-1.el10_2, ansible-automation-platform/automation-portal:1785854226, ansible-automation-platform/automation-portal:1784622951, ansible-automation-platform/bootc-automation-portal-rhel9:1786006573, rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend:1785332825
- Upgrade to a fixed version listed by Atlassian: Jira Service Management Data Center and Server: 11.3.11 (LTS) recommended Data Center Only; Jira Service Management Data Center and Server: 10.3.25 (LTS) Data Center Only. (Atlassian)
Vendor advisories for CVE-2026-48801
Atlassian
1 advisory- Advisory severityHigh8.7
High [CVE-2026-48801] DoS (Denial of Service) linkify-it Dependency in Jira Service Management Data Center
CVE-2026-48801Source published
DoS (Denial of Service) linkify-it Dependency in Jira Service Management Data Center. Affected: Jira Service Management Data Center and Server. Listed in Atlassian's Security Bulletin of September 15 2026.
- Affected products in this advisory
- Jira Service Management Data Center and Server
- Source-reported affected versions
- Jira Service Management Data Center and Server: 11.3.0 to 11.3.10 (LTS)
- Jira Service Management Data Center and Server: 11.2.0 to 11.2.1
- Jira Service Management Data Center and Server: 11.1.0 to 11.1.1
- Jira Service Management Data Center and Server: 11.0.0 to 11.0.1
8 more entries in the full advisory.
- Source-reported fixed versions
- Jira Service Management Data Center and Server: 11.3.11 (LTS) recommended Data Center Only
- Jira Service Management Data Center and Server: 10.3.25 (LTS) Data Center Only
- Mitigation guidance
- Upgrade to a fixed version listed by Atlassian: Jira Service Management Data Center and Server: 11.3.11 (LTS) recommended Data Center Only; Jira Service Management Data Center and Server: 10.3.25 (LTS) Data Center Only.
Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-48801] Denial of Service via algorithmic complexity vulnerability
CVE-2026-48801Source published Source updated
linkify-it is a links recognition library with full Unicode support. Prior to 5.0.1, LinkifyIt.prototype.match, the package's primary public API, has O(N²) algorithmic complexity for inputs containing many fuzzy links or emails because the JavaScript-level scan loop re-slices input and re-runs unanchored regex searches on progressively shorter tails. Any service that synchronously renders untrusted Markdown with linkify:true on a request hot path can inherit a worker-process denial of service triggerable by a tens-of-KB request body. This issue is fixed in version 5.0.1. This can be exploited by a remote attacker sending a specially crafted request body, leading to a worker-process denial of service (DoS) due to excessive CPU usage when synchronously rendering untrusted Markdown with…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Ansible Automation Platform 2.1
- Red Hat Ansible Automation Platform 2.2
- Red Hat Developer Hub 1.10
17 more entries in the full advisory.
- Source-reported affected versions
- < 5.0.1
- Source-reported fixed versions
- 5.0.1
- rh-podman-desktop-0:1.1.2-1.el10_2
- ansible-automation-platform/automation-portal:1785854226
- ansible-automation-platform/automation-portal:1784622951
46 more entries in the full advisory.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
References
More Atlassian advisories
CVE-2026-93748Oct 20, 2026Information Disclosure http-cache-semantics Dependency in Jira Software Data CenterCVE-2026-84375Oct 20, 2026DoS (Denial of Service) js-yaml Dependency in Jira Software Data CenterCVE-2026-84292Oct 20, 2026SSRF (Server-Side Request Forgery) fast-uri Dependency in Jira Software Data CenterCVE-2026-75596Oct 20, 2026DoS (Denial of Service) io.netty:netty-handler Dependency in Bamboo Data CenterCVE-2026-75595Oct 20, 2026BASM (Broken Authentication & Session Management) io.netty:netty-handler DependencyCVE-2026-75140Oct 20, 2026DoS (Denial of Service) org.jsoup:jsoup Dependency in Bamboo Data Center
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