Unknown severity · Source severity not reportedCVE-2026-115822

Starman versions before 0.4019 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodiesCVE-2026-115822

Answer in brief

CVE-2026-115822 records a Unknown severity vulnerability in Starman versions before 0.4019 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies. The current sources do not mark it as known exploited. The current feed maps Starman (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 Oct 25, 2026Updated Oct 25, 2026Source checked Oct 25, 2026First seen by HOL Oct 25, 2026Material review Oct 25, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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 Starman (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Starmangeneric	>=0 <0.4019	0.4019

Recommended response

Check inventory. Check lockfiles and deployed manifests for Starman.
Review the reported fix. Source-reported solution: Upgrade to Starman 0.4019 or later.

Evidence timeline and material changes

Published upstream
Oct 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 25, 2026

Sources and claim methodology

Upstream source description

Starman versions before 0.4019 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies. Starman decodes chunked request bodies before calling the application, matching each chunk-size line with `s/^(([0-9a-fA-F]+).*\015\012)//`. A line of hex digits followed by a bare LF and then CRLF never matches, because `.` does not match LF, and each failed attempt backtracks in time quadratic in the length of the hex run. Nothing limits the length of the line. A remote attacker can exhaust worker CPU by sending such requests to any route.

Quoted source text, attributed separately from HOL analysis.