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TREK EUVDEUVD-2026-63704

| CVE-2026-54508 MEDIUM
Server-Side Request Forgery (SSRF) (CWE-918)
2026-08-20 GitHub_M
SSRF Trek
5.3
CVSS 4.0 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
5.4 MEDIUM

Network vector with low privileges (any authenticated user); blind SSRF yields limited confidentiality/integrity impact and no measurable availability impact.

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

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Source Code Evidence Fetched
Aug 20, 2026 - 23:13 vuln.today
Analysis Generated
Aug 20, 2026 - 23:13 vuln.today
Patch available
Aug 20, 2026 - 22:04 EUVD

DescriptionCVE.org

TREK is a collaborative travel planner. Prior to 3.1.0, TREK validates only the initial URL before native redirect following in importGoogleList() and importNaverList() in server/src/services/placeService.ts and resolveGoogleMapsUrl() in server/src/services/mapsService.ts. The affected sinks call checkSsrf() from server/src/utils/ssrfGuard.ts and then use fetch() with redirect: 'follow' instead of the DNS-pinned safeFetch() path, so a public attacker-controlled URL can redirect the server to loopback, RFC 1918, or cloud metadata addresses without revalidation. An authenticated trip member can reach the list-import routes, and any authenticated user can reach /api/maps/resolve-url, allowing blind GET requests to internal services without response-body reflection. This issue is fixed in version 3.1.0.

AnalysisAI

Server-Side Request Forgery in TREK, a collaborative travel planner, allows any authenticated user to pivot the server into making blind GET requests against loopback addresses, RFC 1918 internal networks, or cloud instance metadata endpoints (e.g., 169.254.169.254). The root cause is that importGoogleList(), importNaverList(), and resolveGoogleMapsUrl() validate only the initial submitted URL via checkSsrf() but then call native fetch() with redirect:'follow', bypassing DNS-pinned safeFetch() on redirect hops. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate to TREK instance
Delivery
Submit crafted URL to /api/maps/resolve-url or list-import route
Exploit
Server validates initial URL via checkSsrf()
Execution
Attacker-controlled host returns HTTP redirect to internal address
Persist
Server follows redirect via unguarded fetch()
Impact
Blind GET request hits loopback or cloud metadata endpoint
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid TREK user account. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N) correctly identifies network reachability with no special attack requirements beyond holding a valid user session. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated TREK user submits a crafted Google Maps or Naver Maps list URL pointing to an attacker-controlled HTTP server. That server responds with a 301 redirect to http://169.254.169.254/latest/meta-data/ (AWS instance metadata) or http://10.0.0.1/ (internal network). …
Remediation Upgrade TREK to version 3.1.0, which resolves the vulnerability per the vendor-released patch confirmed in commit ad893eb1cc75b6d56f402d73a6d41bd48ba7ae11 (https://github.com/liketrek/TREK/commit/ad893eb1cc75b6d56f402d73a6d41bd48ba7ae11) and pull request #1185 (https://github.com/liketrek/TREK/pull/1185). … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-63704 vulnerability details – vuln.today
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