Enhancesoft osTicket 1.18.2 Session Identifier session expiration

Summaryinfo

A vulnerability was found in Enhancesoft osTicket 1.18.2. It has been classified as problematic. This affects an unknown function of the component Session Identifier Handler. Performing a manipulation results in session expiration. This vulnerability was named CVE-2026-9507. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic has been found in Enhancesoft osTicket 1.18.2. This affects an unknown code block of the component Session Identifier Handler. The manipulation with an unknown input leads to a session expiration vulnerability. CWE is classifying the issue as CWE-613. According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization." This is going to have an impact on integrity. The summary by CVE is:

A session fixation vulnerability has been identified in osTicket v1.18.2. This security flaw allows an attacker to hijack a victim’s account by keeping the initial session identifier (OSTSESSID) active after a successful login. The issue lies in the fact that the application does not invalidate the pre-authentication cookie or generate a new identifier for the authenticated context. As a result, if an attacker manages to set a known session identifier in the victim’s browser, they will be able to maintain unauthorised access to the account once the victim has authenticated.

The weakness was presented by Mario Valiente. The advisory is shared at incibe.es. This vulnerability is uniquely identified as CVE-2026-9507 since 05/25/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/16/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-37079). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Ticket Tracking Software

Vendor

• Enhancesoft

Name

• osTicket

Version

• 1.18.2

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion