CVE-2026-59326 — HTTP Proxy Credentials Logged in Plaintext by the Spring Boot Language Server
The Spring Boot language server logs the raw value of the https_proxy/HTTPS_PROXY/http_proxy/HTTP_PROXY environment variable at INFO level whenever it creates an outbound HTTP client and no explicit http.proxy workspace setting is configured. Corporate proxy URLs frequently embed Basic-auth credentials in the form http://user:pass@proxy:8080, and the language server writes this value to its log file without any redaction. Since language server log files are often attached to bug reports or are readable by other local users/processes, this can result in disclosure of proxy credentials. Affected Spring Products and Versions: Spring Tools for Eclipse: 5.2.0 and earlier Spring Tools for VSCode / Cursor / Theia: 2.2.0 and earlier
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- No scoring signals.
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
CISA SSVC assessment CISA
Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Broadcom Spring Tools, Spring Spring Tools for Eclipse, Spring Spring Tools for VSCode / Cursor / Theia).
- No fix documented in the sources: reduce exposure and monitor the vendor advisory.
- Search available logs for exploit probes matching the vulnerability class (info disclosure), errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Broadcom | Spring Tools | < 2.3.0< 5.3.0 | Vulnerable | NIST National Vulnerability Database |
| Spring | Spring Tools for Eclipse | ≤ 5.2.0 | Vulnerable | CVE Program (cve.org) e CISA ADP |
| Spring | Spring Tools for VSCode / Cursor / Theia | ≤ 2.2.0 | Vulnerable | CVE Program (cve.org) e CISA ADP |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 3.3 | CVSS 3.1 | Low | 1.8 | 1.4 | security@vmware.com via NIST National Vulnerability Database |
| 3.3 | CVSS 3.1 | Low | — | — | vmware via CVE Program (cve.org) e CISA ADP |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N (score shown at the top: security@vmware.com) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
- Look for anomalous data read/export volumes and access to sensitive records.
Timeline
What happened to this CVE, newest first.
- 2026
- Affected products added · spring/spring tools for eclipse, spring/spring tools for vscode / cursor / theia
- SSVC assessment updated
- Record published
- CVSS changed · 3.3
- Source status changed · → Analyzed
- Record created in this database
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 1× Official description updated · Oct 15, 2026 – Oct 15, 2026
References
1 on the record
Elsewhere on this site
Related CVEs (same products)
- Medium CVE-2026-59327 Cleartext Storage of Spring Boot DevTools Remote Secret in Eclipse Launch Configurations Jul 30, 2026
- Medium CVE-2026-59328 Cross-Site Scripting in Eclipse Spring Boot Starter Wizard Dependency Tooltips Jul 30, 2026
- High CVE-2026-47858 live information startup mode is vulnerable for remote code execution Jul 30, 2026
- High CVE-2026-47873 The Boot Dashboard Docker integration in Spring Tools publishes container control ports… Jul 30, 2026
- High CVE-2026-47882 When enabling Spring Boot DevTools support for a remote application target (for example… Jul 30, 2026
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No FIRST EPSS score.
- No fixed version, patch or mitigation documented.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2026-59326 is "HTTP Proxy Credentials Logged in Plaintext by the Spring Boot Language Server", rated Low. It affects Spring Tools (Broadcom); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 3.3 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
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