CPANSA-Plack-Middleware-ETag-2026-111946: Plack-Middleware-ETag vulnerability
| Publisher | giterlizzi | Document category | csaf_security_advisory |
|---|---|---|---|
| Initial release date | 2026-10-19T00:00:00 | Engine | CSAF Perl Toolkit 0.26 |
| Current release date | 2026-10-19T00:00:00 | Build Date | |
| Current version | 1 | Status | final |
| CVSS v3.1 Base Score | Severity | ||
| Original language | Language | en | |
| Also referred to | |||
Vulnerability Description
Plack::Middleware::ETag versions from 0.04 before 0.06 for Perl disclose file inode numbers in the default ETag header.
When the response body is a filehandle and the file_etag option is not set, the ETag is built from the file's inode number, modification time and size. Clients receiving affected responses may use the disclosed inode numbers to aid backend fingerprinting and correlation of files served through different URLs.
Vulnerabilities
CVE-2026-111946
Vulnerability DescriptionPlack::Middleware::ETag versions from 0.04 before 0.06 for Perl disclose file inode numbers in the default ETag header.
When the response body is a filehandle and the file_etag option is not set, the ETag is built from the file's inode number, modification time and size. Clients receiving affected responses may use the disclosed inode numbers to aid backend fingerprinting and correlation of files served through different URLs.
| Weakness | CWE-497 : Exposure of Sensitive System Information to an Unauthorized Control Sphere |
|---|
Product status
Known affected
| Product | Score | ||||
|---|---|---|---|---|---|
| Plack-Middleware-ETag greater than 0.04 and less than 0.06 |
|
Fixed
- Plack-Middleware-ETag greater than or equal 0.06
giterlizzi
Namespace: https://github.com/giterlizzi/
gdt@cpan.org
References
- CPANSA-Plack-Middleware-ETag-2026-111946 JSON self
https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-plack-middleware-etag-2026-111946.json - https://github.com/robrwo/perl-Plack-Middleware-ETag/security/advisories/GHSA-943g-rgq5-6xc8 external
https://github.com/robrwo/perl-Plack-Middleware-ETag/security/advisories/GHSA-943g-rgq5-6xc8 - https://metacpan.org/release/RRWO/Plack-Middleware-ETag-0.06/changes external
https://metacpan.org/release/RRWO/Plack-Middleware-ETag-0.06/changes - https://www.cve.org/CVERecord?id=CVE-2003-1418 external
https://www.cve.org/CVERecord?id=CVE-2003-1418 - CVE-2026-111946 (NVD) external
https://nvd.nist.gov/vuln/detail/CVE-2026-111946
Revision history
| Version | Date of the revision | Summary of the revision |
|---|---|---|
| 1 | Mon Oct 19 00:00:00 2026 | First release |
Sharing rules
TLP:WHITE
For the TLP version see: https://www.first.org/tlp/