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TI-2026-80005 Aliases CVE-2026-115897GHSA-m5mm-p8h7-m29v

Cross-site scripting in serialize-javascript via unescaped closing script prefix

Priority LOW 11CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
High
Attack requirements
Present
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-79.

Summary

Serialize JavaScript (serialize-javascript) versions from 0 before 7.1.3 are affected. The function-source escaping logic fails to neutralize a bare closing script prefix when attacker-influenced function source ends exactly at that prefix, which is a cross-site scripting weakness (CWE-79). An attacker who controls a serialized function's source text, such as through a spoofed toString(), can have a delimiter from surrounding serialized output end an HTML script element and inject markup that becomes a live element in the page. The CVSS 4.0 vector rates this as low severity with passive user interaction required.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

Serialize JavaScript serializes JavaScript values to a superset of JSON that includes regular expressions and functions. Prior to 7.1.3, the function-source escaping logic does not neutralize a bare closing-script prefix when attacker-influenced function source text ends exactly at that prefix. Because each function body is escaped independently, a delimiter supplied by surrounding serialized output can terminate an HTML script element, and a later serialized value supplies injected markup that becomes a live element in the page. Exploitation requires control of a serialized function's source text, such as through a spoofed toString(). This issue is fixed in version 7.1.3.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00307 23rd percentileScored 2026-11-07
Fix Fixed serialize-javascript (yahoo): 7.1.3serialize-javascript (npm): 7.1.3Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
yahooserialize-javascriptbefore 7.1.37.1.3Patch availableCNA
—serialize-javascript (npm)before 7.1.37.1.3Patch availableGHSA-m5mm-p8h7-m29v
  • serialize-javascript Vendoryahoo Affected before 7.1.3 Fixed in 7.1.3 Patch available CNA
  • serialize-javascript (npm) Vendor— Affected before 7.1.3 Fixed in 7.1.3 Patch available GHSA-m5mm-p8h7-m29v

Remediation

Update serialize-javascript to version 7.1.3, which fixes the issue. Red Hat fixes Red Hat Hardened Images in advisory RHSA-2026:93601, released 2026-11-02.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA serialize-javascript (yahoo) Fixed in 7.1.3
  • Fix · GHSA-m5mm-p8h7-m29v serialize-javascript (npm) Fixed in 7.1.3 Advisory →

Red Hat 1 advisory

  • RHSA-2026:93601 Released 2026-11-02 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images grafana12.4-12.4.13-0.6.hum1@aarch64, grafana12.4-12.4.13-0.6.hum1@src, grafana12.4-12.4.13-0.6.hum1@x86_64

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:93601
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-23 Threatist record created from CVE-2026-115897
  2. 2026-10-23 Alias added: GHSA-m5mm-p8h7-m29v
  3. 2026-10-23 Fix available: npm/[email protected] · GHSA-m5mm-p8h7-m29v
  4. 2026-10-23 CVSS score added · GHSA-m5mm-p8h7-m29v
  5. 2026-10-23 Weakness changed · GHSA-m5mm-p8h7-m29v
  6. 2026-10-23 5 new references · GHSA-m5mm-p8h7-m29v
  7. 2026-10-24 Affected versions changed · Red Hat
  8. 2026-10-24 CVSS score added · Red Hat
  9. 2026-10-26 CISA SSVC decision points changed
  10. 2026-11-03 Fix available: RHSA-2026:93601 · Red Hat
  11. 2026-11-03 Fix available: Red Hat Hardened Images · Red Hat

References

Other 5

  • TI-2007-03044 Buffer overflow in the Yahoo! Webcam Upload ActiveX control in ywcupl.dll 2.0.1.4 for… CVSS 2.0HIGH 9.3
  • TI-2026-62497 CMAK through 3.0.0.6 Cross-Site Request Forgery via Missing CSRF Filter CVSS 4.0HIGH 7.2
  • TI-2007-04373 Buffer overflow in a certain ActiveX control in YVerInfo.dll before 2007.8.27.1 in the… CVSS 2.0HIGH 9.3
  • TI-2026-41720 Elide 7.1.17 - Permission Bypass in Sort Expression Validation CVSS 4.0MEDIUM 5.3
  • TI-2007-03904 Stack-based buffer overflow in the YDPCTL.YDPControl.1 (aka Yahoo! Installer Plugin for… CVSS 2.0HIGH 9.3
  • TI-2007-03045 Buffer overflow in the Yahoo! Webcam Viewer ActiveX control in ywcvwr.dll 2.0.1.4 for… CVSS 2.0HIGH 9.3
See all 75 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences