CVE-2026-63481: Hurl Cookies Vulnerability

MODERATE
Advisory Identifier: GHSA-7w2g-9mf9-324m
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CWE-201
Published
Advisory Summary

CVE-2026-63481 is a MODERATE cookies vulnerability (CWE-201: Insertion of Sensitive Information Into Sent Data) affecting Hurl libraries in the crates.io ecosystem. The issue involves cookies in cookies section leak when redirecting to a different host. Remediation is available in the latest vendor maintenance releases.

CVE-2026-63481 at a Glance

CVE Identifier CVE-2026-63481
GHSA Identifier GHSA-7w2g-9mf9-324m
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-201: Insertion of Sensitive Information Into Sent Data
Affected Product Hurl
Package Ecosystem crates.io
Published Date
Last Updated

How to Fix CVE-2026-63481

To remediate this vulnerability, upgrade all affected Hurl dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

hurl fixed: Latest secure release 
Upgrade hurl to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for hurl

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-63481, inspect your project dependencies for Hurl:

inspect dependencies for hurl

Analyze the terminal output to locate any version of Hurl in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-201: Insertion of Sensitive Information Into Sent Data, where the code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor. In Hurl, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## The Bug Hurl <= 8.0.1 lets you define cookies two ways in a .hurl file: 1. As a raw Cookie: header in the [Header]/headers area 2. In a dedicated [Cookies] section (parsed into RequestSpec.cookies) When following a redirect to a different host, Hurl correctly strips security-sensitive data (Authorization, Cookie header, and basic-auth user) to avoid leaking credentials cross-host — mirroring libcurl's default behavior. But it only stripped the cookie that came in as a header. Cookies declared in the [Cookies] section were carried over to the new host unchanged — a credential-leak bug. Hurl file that leaks cookies: ```hurl GET http://localhost:8000/follow-redirect-basic-auth?change_host=true [Cookies] fruit: lemon HTTP 200 ``` Hurl file that doesn't leak cookie: ```hurl GET http://localhost:8000/follow-redirect-basic-auth?change_host=true Cookie: fruit=lemon HTTP 200 ``` ## Patch With Hurl <= 8.0.1, user can use `Cookie` header instead of the dedicated `[Cookies]` section.

CVE-2026-63481 Affected Hurl Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
hurl
 crates.io
≤ 8.0.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/Orange-OpenSource/hurl/security/advisories/GHSA-7w2g-9mf9-324m
NVD — CVE-2026-63481 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63481
Hurl Source Repository REPOSITORY
https://github.com/Orange-OpenSource/hurl/pull/5119
Security Fix Commit FIX COMMIT
https://github.com/Orange-OpenSource/hurl/commit/ed91c894c2cf11704422010554037e3ba70b446e
Hurl Source Repository REPOSITORY
https://github.com/Orange-OpenSource/hurl

Frequently Asked Questions

What is CVE-2026-63481?
CVE-2026-63481 is a security vulnerability in Hurl involving Cookies in Cookies section leak when redirecting to a different host under CWE-201: Insertion of Sensitive Information Into Sent Data.
Which Hurl versions are affected?
Affected versions include releases prior to current release patches across affected packages: hurl.
What version fixes CVE-2026-63481?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is hurl affected?
Yes, hurl is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with CVE-2026-63481?
CVE-2026-63481 is classified under CWE-201: Insertion of Sensitive Information Into Sent Data (The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor.).
How can I check crates.io dependencies for CVE-2026-63481?
Run the dependency tree command: 'inspect dependencies for hurl'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7w2g-9mf9-324m",
  "modified" : "2026-09-02T22:11:11Z",
  "published" : "2026-09-02T22:11:11Z",
  "aliases" : [ "CVE-2026-63481" ],
  "summary" : "Hurl: Cookies in Cookies section leak when redirecting to a different host",
  "details" : "## The Bug\n\nHurl <= 8.0.1 lets you define cookies two ways in a .hurl file:\n\n1. As a raw Cookie: header in the [Header]/headers area\n2. In a dedicated [Cookies] section (parsed into RequestSpec.cookies)\n\nWhen following a redirect to a different host, Hurl correctly strips security-sensitive data (Authorization, Cookie header, and basic-auth user) to avoid leaking credentials cross-host — mirroring libcurl's default behavior. But it only stripped the cookie that came in as a header. Cookies declared in the [Cookies] section were carried over to the new host unchanged — a credential-leak bug. \n\nHurl file that leaks cookies:\n\n```hurl\nGET http://localhost:8000/follow-redirect-basic-auth?change_host=true\n[Cookies]\nfruit: lemon\nHTTP 200\n```\n\nHurl file that doesn't leak cookie:\n\n```hurl\nGET http://localhost:8000/follow-redirect-basic-auth?change_host=true\nCookie: fruit=lemon\nHTTP 200\n```\n\n## Patch\n\nWith Hurl <= 8.0.1, user can use `Cookie` header instead of the dedicated `[Cookies]` section.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "hurl"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "8.0.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/Orange-OpenSource/hurl/security/advisories/GHSA-7w2g-9mf9-324m"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-63481"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Orange-OpenSource/hurl/pull/5119"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Orange-OpenSource/hurl/commit/ed91c894c2cf11704422010554037e3ba70b446e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Orange-OpenSource/hurl"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-201" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-02T22:11:11Z",
    "nvd_published_at" : "2026-08-20T17:19:15Z"
  }
}