Security readout for executives and security teams
Plain-English summary
CVE-2026-24771 is an XSS issue in Hono’s JSX ErrorBoundary component. In some usage patterns, user-controlled text could be rendered as HTML, letting script run in a victim’s browser. The issue affects Hono versions before 4.11.7 and is patched in 4.11.7.
Executive priority
Prioritize remediation for internet-facing applications using Hono JSX ErrorBoundary, especially where users can influence error messages or displayed content. This is not currently evidenced as actively exploited, but patching is straightforward and reduces browser-side attack risk.
Technical view
The vulnerability is CWE-79 in hono/jsx ErrorBoundary. Prior to Hono 4.11.7, certain handling of untrusted strings could bypass safe rendering and output raw HTML. CVSS 3.1 is 4.7 with network attack vector, high complexity, no privileges required, and required user interaction.
Likely exposure
Exposure is likely limited to applications using Hono versions below 4.11.7 and the hono/jsx ErrorBoundary component with user-controlled strings reaching error-rendering paths. Applications not using hono/jsx ErrorBoundary are less likely to be affected, based on the provided description.
Exploitation context
The CVE is not listed as KEV in the provided data, and no cited source states active exploitation. Successful abuse requires a user interaction scenario and specific vulnerable usage patterns, but could affect browser-side confidentiality and integrity for impacted users.
Researcher notes
The public record identifies the vulnerable component, affected version range, patched version, CWE, CVSS vector, advisory, and fixing commit. The sources do not provide evidence of exploitation in the wild or broader affected products beyond honojs/hono.
Mitigation direction
- Upgrade Hono to version 4.11.7 or later.
- Review the GitHub advisory for vendor-specific guidance.
- If immediate upgrade is blocked, reduce user-controlled content reaching ErrorBoundary rendering paths.
Validation and detection
- Inventory projects using the hono package.
- Check dependency manifests and lockfiles for Hono versions below 4.11.7.
- Identify use of hono/jsx ErrorBoundary in application code.
- Review whether user-controlled strings can reach ErrorBoundary output.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-24771 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N1.62.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.7MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/honojs/hono/security/advisories/GHSA-9r54-q6cx-xmh5CVE reference · x_refsource_CONFIRM
- https://github.com/honojs/hono/commit/2cf60046d730df9fd0aba85178f3ecfe8212d990CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.