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  4. CVE 2026 88038 cookies vulnerable to set cookie attribute
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Back to active CVEs
Medium · CVSS 4.8CVE-2026-88038

cookies vulnerable to Set-Cookie attribute injection via unvalidated domain and path optionsCVE-2026-88038

Answer in brief

CVE-2026-88038 records a Medium severity (CVSS 4.8) vulnerability in cookies vulnerable to Set-Cookie attribute injection via unvalidated domain and path options. The current sources do not mark it as known exploited. The current feed maps cookies/cookies (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 10, 2026Updated Sep 10, 2026Source checked Oct 25, 2026First seen by HOL Sep 10, 2026Material review Sep 10, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 4.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 4.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps cookies/cookies (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
cookies/cookiesgeneric>=0 <0.9.20.9.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for cookies/cookies.
  2. 2Review the reported fix. Update cookies/cookies to 0.9.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 10, 2026

Sources and claim methodology

  • Source referencecna.openjsf.org
  • GitHub security advisorygithub.com
Upstream source description

cookies is a Node.js library for reading and writing HTTP cookies, used by Koa via ctx.cookies. In versions before 0.9.2 the library validates the cookie name and value against character sets that reject the semicolon separator, but the domain and path options are checked only against a permissive RFC 7230 field-content matcher that allows semicolons, and both are written into the Set-Cookie header unescaped. An application that passes untrusted or request-derived data into the domain or path option can therefore inject additional cookie attributes, overriding SameSite, Secure, HttpOnly, or Domain on the cookies the application issues. This is a Set-Cookie attribute injection issue (CWE-74). The issue is fixed in cookies 0.9.2, which validates domain and path against RFC 6265 character sets. As a workaround, keep domain and path application-set rather than derived from untrusted input.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • SourceCodester Performance Indicator System deleteproduct.php sql injectionAlso CWE-74
  • Alfresco Activiti JuelScriptEngine.java JuelScriptEngine.eval code injectionAlso CWE-74
  • SourceCodester Performance Indicator System adddealer.php sql injectionAlso CWE-74
  • SourceCodester Performance Indicator System edit_dealer.php sql injectionAlso CWE-74
  • SourceCodester Performance Indicator System save_profile.php sql injectionAlso CWE-74
  • DedeCMS update_guide.php require_once code injectionAlso CWE-74

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-74
Source
CVE List V5
Source checked
Oct 25, 2026
References
2 linked sources
Open source record