CPANSA-String-Util-2026-14895: String-Util vulnerability
| Publisher | giterlizzi | Document category | csaf_security_advisory |
|---|---|---|---|
| Initial release date | 2026-07-07T00:00:00 | Engine | CSAF Perl Toolkit 0.26 |
| Current release date | 2026-07-07T00:00:00 | Build Date | |
| Current version | 1 | Status | final |
| CVSS v3.1 Base Score | 7.5 | Severity | |
| Original language | Language | en | |
| Also referred to | |||
Vulnerability Description
String::Util versions before 1.36 for Perl are susceptible to a regular expression denial of service. The trim and rtrim functions stripped trailing whitespace with s/\s*$//u. Because \s* matches greedily and the $ anchor fails whenever a non-whitespace character follows the whitespace, the regex engine retries the match at each offset of a long whitespace run, producing quadratic backtracking. The fix replaces \s*$ with \s+$. Any caller that passes untrusted input to trim or rtrim can trigger CPU exhaustion with a string containing a long run of whitespace.
Vulnerabilities
CVE-2026-14895
Vulnerability DescriptionString::Util versions before 1.36 for Perl are susceptible to a regular expression denial of service.
The trim and rtrim functions stripped trailing whitespace with s/\s*$//u. Because \s* matches greedily and the $ anchor fails whenever a non-whitespace character follows the whitespace, the regex engine retries the match at each offset of a long whitespace run, producing quadratic backtracking. The fix replaces \s*$ with \s+$.
Any caller that passes untrusted input to trim or rtrim can trigger CPU exhaustion with a string containing a long run of whitespace.
| Weakness | CWE-1333 : Inefficient Regular Expression Complexity |
|---|
Product status
Known affected
| Product | Score | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| String-Util less than 1.36 |
|
Fixed
- String-Util greater than or equal 1.36
giterlizzi
Namespace: https://github.com/giterlizzi/
gdt@cpan.org
References
- CPANSA-String-Util-2026-14895 JSON self
https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-string-util-2026-14895.json - https://github.com/scottchiefbaker/String-Util/commit/f8150867aaeb8f57c59601aefb2193f2caed8745.patch external
https://github.com/scottchiefbaker/String-Util/commit/f8150867aaeb8f57c59601aefb2193f2caed8745.patch - https://github.com/scottchiefbaker/String-Util/releases external
https://github.com/scottchiefbaker/String-Util/releases - https://metacpan.org/release/BAKERSCOT/String-Util-1.36/diff/BAKERSCOT/String-Util-1.35#lib/String/Util.pm external
https://metacpan.org/release/BAKERSCOT/String-Util-1.36/diff/BAKERSCOT/String-Util-1.35#lib/String/Util.pm - http://www.openwall.com/lists/oss-security/2026/07/07/18 external
http://www.openwall.com/lists/oss-security/2026/07/07/18 - CVE-2026-14895 (NVD) external
https://nvd.nist.gov/vuln/detail/CVE-2026-14895
Revision history
| Version | Date of the revision | Summary of the revision |
|---|---|---|
| 1 | Tue Jul 7 00:00:00 2026 | First release |
Sharing rules
TLP:WHITE
For the TLP version see: https://www.first.org/tlp/