CVE-2026-32726
SciTokens C++: Sibling-Path Authorization Bypass
SciTokens C++ is a minimal library for creating and using SciTokens from C or C++. Prior to version 1.4.1, scitokens-cpp is vulnerable to an authorization bypass in path-based scope validation. The enforcer used a simple string-prefix comparison when checking whether a requested resource path was covered by a token's authorized scope path. Because the check did not require a path-segment boundary, a token scoped to one path could incorrectly authorize access to sibling paths that merely started with the same prefix. This issue has been patched in version 1.4.1.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
8.1
SciTokens C++: Sibling-Path Authorization Bypass
SciTokens C++ is a minimal library for creating and using SciTokens from C or C++. Prior to version 1.4.1, scitokens-cpp is vulnerable to an authorization bypass in path-based scope validation. The enforcer used a simple string-prefix comparison when checking whether a requested resource path was covered by a token's authorized scope path. Because the check did not require a path-segment boundary, a token scoped to one path could incorrectly authorize access to sibling paths that merely started with the same prefix. This issue has been patched in version 1.4.1.
- Record
CVE-2026-32726- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
EUVDEUVD-2026-17563
8.1
SciTokens C++ is a minimal library for creating and using SciTokens from C or C++. Prior to version 1.4.1, scitokens-cpp is vulnerable to an authorization bypass in path-based scope validation. The enforcer used a simple string-prefix comparison when checking whether a requested resource path was covered by a token's authorized scope path. Because the check did not require a path-segment boundary, a token scoped to one path could incorrectly authorize access to sibling paths that merely started with the same prefix. This issue has been patched in version 1.4.1.
- Record
EUVD-2026-17563- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
NVD
8.1
SciTokens C++ is a minimal library for creating and using SciTokens from C or C++. Prior to version 1.4.1, scitokens-cpp is vulnerable to an authorization bypass in path-based scope validation. The enforcer used a simple string-prefix comparison when checking whether a requested resource path was covered by a token's authorized scope path. Because the check did not require a path-segment boundary, a token scoped to one path could incorrectly authorize access to sibling paths that merely started with the same prefix. This issue has been patched in version 1.4.1.
- Record
CVE-2026-32726- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV
8.1
SciTokens C++: Sibling-Path Authorization Bypass
SciTokens C++ is a minimal library for creating and using SciTokens from C or C++. Prior to version 1.4.1, scitokens-cpp is vulnerable to an authorization bypass in path-based scope validation. The enforcer used a simple string-prefix comparison when checking whether a requested resource path was covered by a token's authorized scope path. Because the check did not require a path-segment boundary, a token scoped to one path could incorrectly authorize access to sibling paths that merely started with the same prefix. This issue has been patched in version 1.4.1.
- Record
CVE-2026-32726- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-32726
8.1
SciTokens C++ is a minimal library for creating and using SciTokens from C or C++. Prior to version 1.4.1, scitokens-cpp is vulnerable to an authorization bypass in path-based scope validation. The enforcer used a simple string-prefix comparison when checking whether a requested resource path was covered by a token's authorized scope path. Because the check did not require a path-segment boundary, a token scoped to one path could incorrectly authorize access to sibling paths that merely started with the same prefix. This issue has been patched in version 1.4.1.
- Record
DEBIAN-CVE-2026-32726- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-32726
8.1
SciTokens C++ is a minimal library for creating and using SciTokens from C or C++. Prior to version 1.4.1, scitokens-cpp is vulnerable to an authorization bypass in path-based scope validation. The enforcer used a simple string-prefix comparison when checking whether a requested resource path was covered by a token's authorized scope path. Because the check did not require a path-segment boundary, a token scoped to one path could incorrectly authorize access to sibling paths that merely started with the same prefix. This issue has been patched in version 1.4.1.
- Record
UBUNTU-CVE-2026-32726- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
scitokens-cppDebian:12 |
All versions, plus listed versions 0.7.3-11.0.2-11.1.0-11.1.0-1.11.1.0-1.1~exp1 Show 12 moreShow less1.1.0-21.1.1-11.1.2-11.1.2-21.1.3-11.2.0-11.3.0-11.3.0-21.4.0-11.4.1-11.4.1-21.4.1-3 |
None known |
scitokens-cppDebian:13 |
All versions, plus listed versions 1.1.3-11.2.0-11.3.0-11.3.0-21.4.0-11.4.1-11.4.1-21.4.1-3 |
None known |
scitokens-cppDebian:14 |
before 1.4.1-1, plus listed versions 1.1.3-11.2.0-11.3.0-11.3.0-21.4.0-1 |
1.4.1-1 |
scitokens-cppUbuntu:22.04:LTS |
All versions, plus listed versions 0.5.1-20.6.2-10.6.2-1ubuntu10.6.2-20.7.0-10.7.0-2 |
None known |
scitokens-cppUbuntu:24.04:LTS |
All versions, plus listed versions 1.0.2-11.1.0-11.1.0-1.11.1.0-1.1build21.1.0-1.1build3 |
None known |
scitokens-cppUbuntu:25.10 |
All versions, plus listed versions 1.1.3-1 |
None known |
scitokens-cppUbuntu:26.10 |
All versions, plus listed versions 1.3.0-21.4.1-11.4.1-3 |
None known |
scitokens-cppUbuntu:26.04:LTS |
All versions, plus listed versions 1.1.3-11.2.0-11.3.0-11.3.0-2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-32726 is a high vulnerability (CVSS 8.1) in Scitokens Scitokens-cpp, published March 31, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.28%, the 20th percentile. Fixed in scitokens-cpp 1.4.1-1.
References
github.com/scitokens/scitokens-cpp/security/advisories/GHSA-q5fm-fgvx-32jq
github.com/scitokens/scitokens-cpp/commit/decfe2f00cb9cabbf1e17a3bb2cd4ea1bbbd8a73
github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32726.json
nvd.nist.gov/vuln/detail/CVE-2026-32726
security-tracker.debian.org/tracker/CVE-2026-32726
ubuntu.com/security/CVE-2026-32726
cve.org/CVERecord?id=CVE-2026-32726