Tor up to 0.4.9.7 incorrect behavior order

CVSS Meta Temp Score
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CTI Interest Score
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3.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Tor up to 0.4.9.7. This affects an unknown function. The manipulation leads to incorrect behavior order. This vulnerability is uniquely identified as CVE-2026-44600. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Tor up to 0.4.9.7 and classified as problematic. This issue affects some unknown processing. The manipulation with an unknown input leads to a incorrect behavior order vulnerability. Using CWE to declare the problem leads to CWE-696. The product performs multiple related behaviors, but the behaviors are performed in the wrong order in ways which may produce resultant weaknesses. Impacted is availability. The summary by CVE is:

Tor before 0.4.9.7 mishandles accounting of the conflux out-of-order queue during the clearing of a queue, aka TROVE-2026-010.

It is possible to read the advisory at forum.torproject.org. The identification of this vulnerability is CVE-2026-44600 since 05/07/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/13/2026).

The vulnerability scanner Nessus provides a plugin with the ID 313711 (Debian dsa-6260 : tor - security update), 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 a198185ed863677d60eec120126730628dac35bb 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-202605-1451), Tenable (313711) and CERT Bund (WID-SEC-2026-1398). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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: Incorrect behavior order
CWE: CWE-696
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: 313711
Nessus Name: Debian dsa-6260 : tor - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Tor 0.4.9.7
Patch: a198185ed863677d60eec120126730628dac35bb

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-2026-44600 (🔒)
GCVE (CVE): GCVE-0-2026-44600
GCVE (VulDB): GCVE-100-361787
CERT Bund: WID-SEC-2026-1398 - Tor: Mehrere Schwachstellen
CNNVD: CNNVD-202605-1451 - 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 20:07 (6), 05/10/2026 22:05 (2), 05/13/2026 15:31 (7)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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