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PatchSiren cyber security CVE debrief

CVE-2026-32289 Golang CVE debrief

CVE-2026-32289 is a MEDIUM severity vulnerability in Go, allowing for XSS attacks via improper escaping of content in JS template literals. The issue arises from the incorrect tracking of context across template branches and brace depth within JS template literals, leading to potentially incorrect escaping of content. This vulnerability could cause actions within JS template literals to be incorrectly or improperly escaped, leading to XSS vulnerabilities. Developers and administrators using Go versions prior to 1.25.10 or 1.26.3 should be aware of this vulnerability and take necessary actions to mitigate the risk of XSS attacks.

Vendor
Golang
Product
Go
CVSS
MEDIUM 6.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-08
Original CVE updated
2026-07-25
Advisory published
2026-04-08
Advisory updated
2026-07-25

Who should care

Developers and administrators using Go versions prior to 1.25.10 or 1.26.3 should be aware of this vulnerability and take necessary actions to mitigate the risk of XSS attacks. This includes reviewing and updating code that uses JS template literals to ensure proper escaping of content and implementing additional security measures such as input validation and output encoding.

Technical summary

The vulnerability is caused by the improper tracking of context across template branches for JS template literals in Go. This leads to possibly incorrect escaping of content when branches are used. Additionally, template actions within JS template literals do not properly track the brace depth, resulting in incorrect escaping being applied. These issues could cause actions within JS template literals to be incorrectly or improperly escaped, leading to XSS vulnerabilities.

Defensive priority

Medium priority should be given to patching or mitigating this vulnerability, as it could lead to XSS attacks.

Recommended defensive actions

  • Apply the patches provided by the vendor to update Go to version 1.25.10 or 1.26.3.
  • Review and update code that uses JS template literals to ensure proper escaping of content.
  • Implement additional security measures, such as input validation and output encoding, to prevent XSS attacks.
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record was published on 2026-04-08T02:16:03.820Z and was last modified on 2026-07-25T10:10:00.167Z. The NVD entry is currently Analyzed. This vulnerability affects Go versions prior to 1.25.10 or 1.26.3. Developers should verify their deployments and review official advisories for affected scope and severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-32289 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-32289

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-32289 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-32289

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.