VulnerabilityPublished 6 Aug 2026Updated 8 Aug 2026

CVE-2026-48088: open-reception appointment-booking-software · Missing Authorization

Affects open-reception appointment-booking-softwareSource CVE Database V5

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Not known to be exploited · CVSS 9.4 Critical : upgrade to 1.0.4 as a priority.

Data as of 5 Nov 2026, 00:01 UTC

CVSS 3.1 base score

9.4Critical

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 1.0.4

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: Low

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 6 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade appointment-booking-software and open-reception/appointment-booking-software to 1.0.4.

Affected software

Product	Affected	Fixed in
open-receptionappointment-booking-software	Affected <1.0.4	Fixed in 1.0.4
GitHubopen-reception/appointment-booking-software`pkg:github/open-reception/appointment-booking-software`Other threats	Affected <1.0.4	Fixed in 1.0.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Version 1.0.4 of OpenReception's appointment booking software patches this vulnerability. Users should upgrade to version 1.0.4 or later to remediate the issue. No other mitigations are indicated or necessary once the patch is applied.

Description

CVE-2026-48088 is a critical missing authorization vulnerability in OpenReception's appointment booking software prior to version 1.0.4. It allows unauthenticated attackers to store malicious encryption keys for any tenant, effectively registering themselves as encryption recipients for future patient appointments. This breaks the platform's end-to-end encryption guarantees, enabling attackers to decrypt appointment data. The vulnerability also includes a logging bypass variant that suppresses security warnings, and weak schema validation allows malformed entries that disrupt legitimate booking flows. Version 1.0.4 addresses this issue.

Impact

An unauthenticated attacker can inject their own encryption keys into the system for any tenant, breaking the end-to-end encryption model by becoming a co-recipient of encrypted appointment data. This allows the attacker to decrypt sensitive patient appointment information, violating confidentiality. The vulnerability also undermines logging and monitoring by suppressing unauthorized access warnings, increasing the risk of undetected exploitation. Additionally, weak validation of cryptographic keys can disrupt legitimate booking operations.

Summary

OpenReception's appointment booking software before version 1.0.4 contains a missing authorization vulnerability (CWE-862) in the POST /api/tenants/{tenantId}/staff/{staffId}/crypto endpoint. This endpoint accepts and stores attacker-controlled ML-KEM-768 public keys without authentication, allowing an unauthenticated network attacker to register as an additional encryption recipient for any tenant's appointments. The vulnerability includes a logging bypass where omission of the email field and absence of a registration cookie causes the system to treat the request as legitimate, suppressing the unauthorized warning. The staff_crypto table lacks unique constraints on user_id, allowing multiple attacker keys per staffId, which need not correspond to valid users. Weak schema validation permits malformed cryptographic keys. The attacker-controlled keys are returned by the public booking API and used to encrypt appointment tunnel keys, enabling the attacker to decrypt appointment payloads. Version 1.0.4 patches this vulnerability.

CWE-862Missing Authorization (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #4OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Architecture and Design
Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries.
Architecture and Design
Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V13.4.2 (opens in a new tab)
V7.2.2 (opens in a new tab)
Attack patterns
Exploitation of Thunderbolt Protection Flaws (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 14 Aug 2026, 15:51 UTC

WeaknessesCWE-862

Technical details

References

Community reviews

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