String::Util versions before 1.36 for Perl are susceptible to a regular expression denial of service (CVE-2026-14895) | HOL Guard CVE

High · CVSS 7.5CVE-2026-14895

String::Util versions before 1.36 for Perl are susceptible to a regular expression denial of service

Answer in brief

CVE-2026-14895 records a High severity (CVSS 7.5) vulnerability in String::Util versions before 1.36 for Perl are susceptible to a regular expression denial of service. The current sources do not mark it as known exploited. The current feed maps BAKERSCOT/String::Util (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 Jul 7, 2026Updated Jul 8, 2026Source checked Sep 19, 2026First seen by HOL Jul 8, 2026Material review Jul 8, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. 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 BAKERSCOT/String::Util (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
BAKERSCOT/String::Utilgeneric	>=0 <1.36	1.36

Recommended response

Check inventory. Check lockfiles and deployed manifests for BAKERSCOT/String::Util.
Review the reported fix. Update BAKERSCOT/String::Util to 1.36 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 7, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jul 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 8, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.