VDB-365860 · CVE-2026-49017 · EUVD-2026-32040

OpenStack Swift up to 2.36.1/2.37.1 StreamingInput infinite loop

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.1	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in OpenStack Swift up to 2.36.1/2.37.1. Affected by this vulnerability is the function StreamingInput. Executing a manipulation can lead to infinite loop. This vulnerability is registered as CVE-2026-49017. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in OpenStack Swift up to 2.36.1/2.37.1. This vulnerability affects the function StreamingInput. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. CVE summarizes:

In OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. The StreamingInput class repeatedly appends an empty buffer and re-reads, causing the proxy-server worker handling the request to become permanently unresponsive with increasing CPU and memory consumption. An authenticated attacker can systematically exhaust all proxy-server workers, resulting in denial of service. The defect was introduced in Swift 2.36.0.

The advisory is shared for download at bugs.launchpad.net. This vulnerability was named CVE-2026-49017 since 05/27/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 318110 (Debian dsa-6314 : python3-swift - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.36.2 or 2.37.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202605-6099), Tenable (318110) and EUVD (EUVD-2026-32040). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Cloud Software

Vendor

OpenStack

Name

Swift

Version

License

free

Website

Vendor: https://www.openstack.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 318110
Nessus Name: Debian dsa-6314 : python3-swift - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Swift 2.36.2/2.37.2

Timelineinfo

05/27/2026 Advisory disclosed
05/27/2026 +0 days CVE reserved
05/27/2026 +0 days VulDB entry created
06/02/2026 +6 days VulDB entry last update

Sourcesinfo

Vendor: openstack.org

Advisory: bugs.launchpad.net
Status: Confirmed

CVE: CVE-2026-49017 (🔒)
GCVE (CVE): GCVE-0-2026-49017
GCVE (VulDB): GCVE-100-365860
EUVD: 🔒
CNNVD: CNNVD-202605-6099 - OpenStack Swift 安全漏洞

Entryinfo

Created: 05/27/2026 06:34
Updated: 06/02/2026 04:17
Changes: 05/27/2026 06:34 (68), 05/27/2026 07:01 (1), 05/28/2026 23:30 (6), 06/02/2026 04:17 (2)
Complete: 🔍
Cache ID: 216::103