Tor up to 0.4.9.7 resource transfer

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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.
3.7$5k-$25k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Tor up to 0.4.9.7. The impacted element is an unknown function. Executing a manipulation can lead to resource transfer. This vulnerability is handled as CVE-2026-44599. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Tor up to 0.4.9.7 and classified as problematic. This vulnerability affects an unknown code block. The manipulation with an unknown input leads to a resource transfer vulnerability. The CWE definition for the vulnerability is CWE-669. The product does not properly transfer a resource/behavior to another sphere, or improperly imports a resource/behavior from another sphere, in a manner that provides unintended control over that resource. As an impact it is known to affect integrity. CVE summarizes:

Tor before 0.4.9.7 can attempt or accept BEGIN_DIR via conflux legs, aka TROVE-2026-008.

The advisory is available at forum.torproject.org. This vulnerability was named CVE-2026-44599 since 05/07/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 05/13/2026).

The vulnerability scanner Nessus provides a plugin with the ID 313060 (Linux Distros Unpatched Vulnerability : CVE-2026-44599), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.4.9.7 eliminates this vulnerability. Applying the patch 50f90ba849088247734786922855c22661c6fa03 is able to eliminate this problem. The bugfix is ready for download at gitlab.torproject.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202605-1452), Tenable (313060) and CERT Bund (WID-SEC-2026-1398). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Debian Linux
  • SUSE openSUSE
  • Open Source Tor

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.7

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.7
CNA Vector (MITRE): 🔒

CVSSv2info

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

Exploitinginfo

Class: Resource transfer
CWE: CWE-669
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 313060
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-44599

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Tor 0.4.9.7
Patch: 50f90ba849088247734786922855c22661c6fa03

Timelineinfo

05/07/2026 Advisory disclosed
05/07/2026 +0 days CVE reserved
05/07/2026 +0 days VulDB entry created
05/13/2026 +6 days VulDB entry last update

Sourcesinfo

Advisory: forum.torproject.org
Status: Confirmed

CVE: CVE-2026-44599 (🔒)
GCVE (CVE): GCVE-0-2026-44599
GCVE (VulDB): GCVE-100-361786
CERT Bund: WID-SEC-2026-1398 - Tor: Mehrere Schwachstellen
CNNVD: CNNVD-202605-1452 - Tor 安全漏洞

Entryinfo

Created: 05/07/2026 07:33
Updated: 05/13/2026 15:31
Changes: 05/07/2026 07:33 (64), 05/08/2026 05:23 (2), 05/08/2026 20:07 (6), 05/13/2026 15:31 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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