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Flyto Core CVE-2026-67424

| EUVDEUVD-2026-50465 HIGH
Server-Side Request Forgery (SSRF) (CWE-918)
2026-07-29 GitHub_M GHSA-c9hr-64h3-gxpc
8.5
CVSS 3.1 · Vendor: GitHub_M
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain low-privileged module access
  2. Delivery
    Point http.get at attacker-controlled URL
  3. Exploit
    Server returns 302 to internal/metadata endpoint
  4. Execution
    Module follows redirect without revalidation
  5. Impact
    Internal response body returned to attacker

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V4 - API and Web Service URL allowlisting, SSRF prevention
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Credential Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires the attacker to be able to invoke one of the http.get, http.request, or http.batch modules and control the target URL passed to it, which per the CVSS PR:L implies an authenticated low-privileged account (or an AI-agent workflow whose URL input the attacker can influence). The core enabling condition is that these modules follow redirects with allow_redirects=True and do not revalidate the Location header per hop, so the attacker must host or control an external endpoint that responds with a 30x redirect into internal address space. Limiting factors: exploitation needs some level of authenticated/module access (not fully unauthenticated), the affected version must be prior to 2.26.7, and value depends on the presence of reachable internal services or a cloud metadata endpoint from the Flyto Core host.

Impact

The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N, base 8.5) indicates network-reachable, low-complexity exploitation by an authenticated low-privileged actor with a changed scope and high confidentiality impact - consistent with SSRF that pivots into a separate internal security context. No EPSS score was provided and the CVE is not listed in CISA KEV, so real-world exploitation probability cannot be quantified from the input; treat exploitation likelihood as unconfirmed rather than low. No POC or public exploit was identified. The signals are internally consistent (network SSRF, low privileges, confidentiality-focused impact), so this is a genuine priority for any deployment where untrusted users or agents can drive the HTTP modules, but the PR:L requirement and niche footprint temper mass-exploitation risk. Key missing data: EPSS, KEV, and any independent exploitation evidence.

Exploit ScenarioDerived

An authenticated user (or an AI agent acting on attacker-influenced input) invokes http.get against an attacker-controlled external URL that passes the initial allowlist check. That server responds with a 302 redirect to http://169.254.169.254/ or an internal service; because redirect hops are not revalidated, Flyto Core follows it and returns the internal response body to the attacker, exposing cloud credentials or internal data. No public POC was identified, but the low attack complexity makes exploitation straightforward once module access is obtained.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 29, 2026

Server-side request forgery in Flyto Core (flyto-core), an execution kernel for automation and AI-agent workflows, allows a low-privileged user who supplies a URL to the http.get, http.request, or http.batch modules to reach internal-only services. Prior to 2.26.7 these modules validated only the initial URL and then followed HTTP redirects (allow_redirects=True) without revalidating each Location hop, so a permitted public URL can 302-redirect into internal address space and return the internal response body to the caller. There is no public exploit identified at time of analysis, but the fix is confirmed in release 2.26.7.

RemediationAI

Vendor-released patch: upgrade to Flyto Core 2.26.7, which adds per-redirect-hop SSRF revalidation via guarded_aiohttp_request (commit 0a0a528520ec18f5a21f1ddf858a71cc1edfb6e9). If immediate upgrade is not possible, disable or restrict the http.get, http.request, and http.batch modules for untrusted callers, and - where the deployment exposes the env-config SSRF controls - ensure SSRF protection is enabled (ssrf_protection_enabled) so outbound URLs are validated; note this does not by itself fix the redirect-revalidation gap, so also disable redirect-following or set allow_redirects=False for these modules as a compensating control, at the cost of breaking legitimate workflows that rely on redirects. At the network layer, apply egress filtering from the Flyto Core host to block loopback, RFC1918 ranges, and cloud metadata endpoints (e.g. 169.254.169.254), accepting that this can break intended internal integrations. Because the same commit also guards vision_analyze, proxy_rotate, slack_send, and graphql query/mutation (GHSA-pgwh-4jj4-qm8v), upgrading is preferable to per-module workarounds. Advisory: https://github.com/flytohub/flyto-core/security/advisories/GHSA-c9hr-64h3-gxpc.

Affected VersionsENISA

flyto-core < 2.26.7

Affected Packages

pypi flyto-core fix: 2.26.7

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in pypi

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The affected component is the atomic HTTP module layer of Flyto Core (src/core/modules/atomic/http/get.py, request.py, batch.py), built on aiohttp. The root cause is CWE-918 (SSRF): the code applied an SSRF allowlist/deny check to the user-provided initial URL but delegated redirect handling to aiohttp with allow_redirects=True, so intermediate and final hops after a 30x redirect were never re-checked. Because Flyto Core is an AI-agent/automation kernel that fetches arbitrary user- or agent-specified URLs server-side, an attacker-controlled external endpoint can return a redirect to loopback, RFC1918 ranges, or cloud metadata endpoints. The vendor fix introduces a guarded_aiohttp_request helper that revalidates every redirect hop through the SSRF guard (enforce_outbound_url / validate_url_with_env_config), and the same commit hardens sibling client-controlled URL sinks (vision_analyze, proxy_rotate, slack_send, graphql query/mutation) under a related advisory GHSA-pgwh-4jj4-qm8v.

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Severity by source

Vendor (GitHub_M) PRIMARY 8.5 HIGH
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
vuln.today AI 8.5 HIGH

Network-reachable SSRF invokable by a low-privileged user (PR:L), no user interaction, scope changes into an internal context (S:C) with high read of internal data (C:H) and limited integrity impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

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

Lifecycle Timeline

2
Patch available
Jul 29, 2026 - 20:02 EUVD
CVE Published
Jul 29, 2026 - 18:32 cve.org
HIGH 8.5

DescriptionCVE.org

Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.7, the HTTP modules http.get, http.request, and http.batch in src/core/modules/atomic/http/get.py, src/core/modules/atomic/http/request.py, and src/core/modules/atomic/http/batch.py validate only the initial URL, then follow redirects with allow_redirects=True and without per-hop Location revalidation, allowing a public URL to redirect into internal address space and return the internal response body. This issue is fixed in version 2.26.7.

Executive ViewAI

Why It Matters

Flyto Core (flyto-core) contains a server-side request forgery vulnerability (CVSS 8.5) that allows low-privileged users to bypass network segmentation and access internal-only services through malicious HTTP redirects. Although no public exploit has been identified at time of analysis, the vulnerability enables unauthorized access to internal databases, admin interfaces, and backend systems that should remain isolated from workflow execution. Organizations running Flyto Core prior to version 2.26.7 face immediate risk and require urgent patching.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.2%
Top 85% exploitable
Prevalence
Low
niche AI-agent automation kernel, limited enterprise deployment
Threat Intel
1
1 source
Exploit
POC
Public exploit code exists
Data Quality
6 sources
Confidence: High
EUVD NVD CVE.org EPSS Vulnrichment GHSA GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC Yes
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
Poc
System Exposure· derived
Open
Automatable
No
Human Impact
High
Technical Impact
Partial

Priority Score

62
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +42
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.

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