CVE
BlueprintUE Self-Hosted Edition 1.0.0 before 4.3.5 Storage Exhaustion via Anonymous Blueprints
BlueprintUE Self-Hosted Edition 1.0.0 through 4.3.4 lets anonymous users create blueprints with no rate limit or storage quota. Fixed in 4.3.5.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 4.3.5
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 4.3.5.
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 26/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Unclear
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
BlueprintUE Self-Hosted Edition contains a resource exhaustion flaw that lets an attacker fill the server's storage by repeatedly creating anonymous blueprints with large requests and a "never" expiration, which bypasses cleanup and can deny service. The attack can be carried out remotely over the network without logging in.
Read the original description
BlueprintUE Self-Hosted Edition 1.0.0 before 4.3.5 contains a resource exhaustion vulnerability that allows unauthenticated attackers to fill server storage by repeatedly creating anonymous blueprints. Attackers can send large requests to HomeController::doProcessCreateBlueprint() with a 'never' expiration, bypassing purges to fill the disk and deny service.
Who should check
Teams running BlueprintUE Self-Hosted Edition 1.0.0 through 4.3.4 that allow anonymous blueprint creation.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure17/25No login or user action needed, reachable over the network without a login · Unknown: Advisories don't say whether default setups are affected
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.7/10CVSS 8.7
- No patch0/5No signal
What would change the score
- Would score about 71 if added to CISA KEV
- Would score about 66 if CISA's SSVC rates exploitation active
- Would score about 31 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 4.3.5.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-126659 (BlueprintUE Self-Hosted Edition 1.0.0 before 4.3.5 Storage Exhaustion via Anonymous Blueprints), using the cve.now data below.
Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.
What cve.now has for CVE-2026-126659 (entry last updated 2026-11-11):
Affected:
- blueprintue blueprintue-self-hosted-edition: from 1.0.0, fixed in 4.3.5
Fixed versions: 4.3.5.
Conditions (all must be true for the bug to be hit):
- BlueprintUE Self-Hosted Edition versions before 4.3.5 (affected versions up to 4.3.4). (source: https://www.vulncheck.com/advisories/blueprintue-self-hosted-edition-1.0.0-before-4.3.5-storage-exhaustion-via-anonymous-blueprints)
- Anonymous (unauthenticated) users can create blueprints, with no effective rate limit or anonymous storage quota. (source: https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-q2vm-p36g-w596)
- Anonymous users can choose a 'never' expiration, so their blueprints are kept indefinitely and skip automatic cleanup. (source: https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-q2vm-p36g-w596)
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
Attacker needs: network access, no login, no user action.
CISA KEV: CVE-2026-126659 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-126659 only. If you also check another CVE, look up its own KEV status; never assume it from this one.
How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.
Verify against the linked advisories before concluding, and cite the date you read each one:
- https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-q2vm-p36g-w596
- https://github.com/blueprintue/blueprintue-self-hosted-edition/commit/0709b39851bf58febccf0bc74b88fa86070410de
- https://github.com/blueprintue/blueprintue-self-hosted-edition/pull/268
- https://github.com/blueprintue/blueprintue-self-hosted-edition/releases/tag/v4.3.5
- https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.4/app/controllers/www/HomeController.php#L151-L214
- https://www.vulncheck.com/advisories/blueprintue-self-hosted-edition-1.0.0-before-4.3.5-storage-exhaustion-via-anonymous-blueprints
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.
Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.
Entry: https://cve.now/CVE-2026-126659
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-126659"}.Timeline
- CVE published
- First seen by cve.now
Affected versions
- blueprintue blueprintue-self-hosted-edition
From 1.0.0 · fixed in 4.3.5
Evidence 8
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Advisory
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Other links · 5
- Patch
- Patch
- Repository
- Repository
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-126659
Is CVE-2026-126659 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
Anonymous users can create blueprints repeatedly and choose a 'never' expiration, so the blueprints are kept indefinitely. Persistent server storage can fill until the disk is full, which denies service to legitimate users.Source: vulncheck.com, github.com
Which versions are affected by CVE-2026-126659?
blueprintue-self-hosted-edition: from 1.0.0 before 4.3.5.Source: cve.now feed data
Am I affected, and how do I check?
Self-Hosted Edition releases from 1.0.0 up to 4.3.4 are in the affected range, and the fix is in 4.3.5. The installed version is the thing to check, and the exposure depends on anonymous blueprint creation being available.Source: vulncheck.com, github.com
How do I fix CVE-2026-126659?
Upgrade to BlueprintUE Self-Hosted Edition 4.3.5 or later.Source: vulncheck.com, github.com