Skip to content
Noroxi
NVD / CVE Program· CNA GitHub_M

CVE-2026-48082: OpenReception's bootstrap challenge proof-of-work difficulty hardcoded to 16 bits, which enables abuse rate amplification

Noroxi assessment

Priority: Monitor (action score 14/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.38% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • No fixed version is recorded, but the references include a patch (commit or PR) link.

Low priority for now. See the fix and affected versions sections below.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.6, the bootstrap challenge endpoint at `/api/tenants/{id}/appointments/bootstrap-challenge` issues a SHA-256 proof-of-work with `difficulty=4` hex zeros, equivalent to 16 bits of work. Modern hardware solves this in under 200 milliseconds, providing essentially no friction against automated abuse of the patient booking flow. Proof-of-work is used in the booking flow as a rate-limiter for unauthenticated clients establishing tunnels and submitting appointments. At 16 bits of difficulty, the construct is decorative rather than effective. An attacker can solve PoW challenges as fast as the server can issue them, defeating the rate-limiting purpose. The handler also calls `challengeThrottleService.checkThrottle(binding, "passkey")`, but the binding includes attacker-controlled values (`tunnelId`, `clientPublicKey`, and optional `emailHash`). For each fresh attempt, the attacker can supply new values, producing a new throttle key and bypassing the per-binding accumulation. Practical abuse friction is therefore the PoW difficulty itself, not a stable per-IP or per-email server-side throttle. Version 1.0.6 fixes the issue.

LowCVSS 3.7 · v3.1—No exploit No fix recorded
Published
Aug 6, 2026
Updated
Oct 23, 2026
EPSS
0.3% · 32th percentile

Report tools

JSON

Action score

14

Monitor

Low priority for now.

CVSS
14 / 40 · 3.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
3.7
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-48082

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for open-reception records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • open-reception appointment-booking-software

    • < 1.0.6affected

Same product

open-reception: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-54460OpenReception: Unauthenticated WebAuthn passkey injection via `POST /api/auth/passkeys` leads to account takeover
    39Monitor
  • CVE-2026-48087OpenReception: WebAuthn passkey injection allows account takeover
    39Monitor
  • CVE-2026-48086OpenReception: Tenant admin self-promotes to GLOBAL_ADMIN
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-48080Aug 6, 2026 · OpenReception's tenant detail endpoint discloses live PostgreSQL connection string, superuser-scoped in the tested official deployment
    32Monitor
  • ← EarlierCVE-2026-48081Aug 6, 2026 · OpenReception vulnerable to stored click-triggered XSS via javascript: tenant links rendered into patient-facing footer
    32Monitor
  • Later →CVE-2026-48083Aug 6, 2026 · OpenReception: Unauthenticated POST /api/log accepts arbitrary content with CRLF injection and no size or rate limits
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-770 · Allocation of Resources Without Limits or Throttling

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records