geopy: Regular Expression Denial of Service (ReDoS) in geopy.Point (CVE-2026-77387) | HOL Guard CVE

Medium · CVSS 4.0CVE-2026-77387

geopy: Regular Expression Denial of Service (ReDoS) in geopy.Point

Answer in brief

CVE-2026-77387 records a Medium severity (CVSS 4.0) vulnerability in geopy: Regular Expression Denial of Service (ReDoS) in geopy.Point. The current sources do not mark it as known exploited. The current feed maps geopy/geopy (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 1, 2026Updated Oct 1, 2026Source checked Oct 1, 2026First seen by HOL Oct 1, 2026Material review Oct 1, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 4.0
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 4.0. 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 geopy/geopy (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
geopy/geopygeneric	<2.5.0	2.5.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for geopy/geopy.
Review the reported fix. Update geopy/geopy to 2.5.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 1, 2026

Sources and claim methodology

Upstream source description

geopy is a geocoding library for Python. Prior to 2.5.0, geopy.Point and Point.from_string() can spend excessive CPU time due to inefficient regular-expression behavior when an application passes a long malformed coordinate string without the 256-character input limit used by the fix. Geocoder reverse methods also reach the vulnerable parsing path when called with string inputs. Repeated attacker-controlled requests can cause a denial of service, while the numeric Point constructor is unaffected. This issue is fixed in version 2.5.0.

Quoted source text, attributed separately from HOL analysis.