CVE-2026-103088

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-30. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Handlebars.java before 4.5.5 allows directory traversal. In handlebars-springmvc 4.5.3 and 4.5.4, the path-containment fix for CVE-2026-63490 validates template locations as raw percent-encoded strings, whereas the template file is opened through a URL handler that percent-decodes the path. In a Spring MVC application with a file: template prefix and a request-derived view name, a percent-encoded traversal such as %2e%2e/ bypasses both the view-resolver check and the loader-side containment and reads files outside the configured template base directory.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
49
EG Risk 49/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
51st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 30, 2026

Last Modified

September 30, 2026

Advisory Details (3)

Auto-updated Sep 30, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

handlebars.java 4.5.5

Patch available: jknack/handlebars.java v4.5.5

https://github.com/jknack/handlebars.java/releases/tag/v4.5.5
github_commit Patch Available

commit f6ae3979917d (jknack/handlebars.java)

Patch available: jknack/handlebars.java v4.5.5 (contains commit f6ae3979917d)

https://github.com/jknack/handlebars.java/commit/f6ae3979917d05bef07f00befb4013ef00503660
github Patch Available

[SECURITY] SpringMVC: file read outside the template directory via percent-encoded path traversal · Advisory · jknack/handlebars.java · GitHub

Affected: 4.5.3 by the two layers this report bypasses. The advisory text and the fix's reg

https://github.com/jknack/handlebars.java/security/advisories/GHSA-pvrx-3g7m-fpgv

Vendor Advisories for CVE-2026-103088(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 26× in last 7d / 26× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 06:44 UTCEG score recompute
  2. 2026-10-05 06:44 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 18:45 UTCGHSA enrichment
  5. 2026-10-04 06:44 UTCGHSA enrichment
  6. 2026-10-03 18:45 UTCEG score recompute
  7. 2026-10-03 18:45 UTCGHSA enrichment
  8. 2026-10-03 14:25 UTCEPSS rescore
  9. 2026-10-03 06:44 UTCGHSA enrichment
  10. 2026-10-02 18:45 UTCEG score recompute
  11. 2026-10-02 18:44 UTCGHSA enrichment
  12. 2026-10-02 06:44 UTCEG score recompute
  13. 2026-10-02 06:44 UTCGHSA enrichment
  14. 2026-10-01 19:49 UTCEPSS rescore
  15. 2026-10-01 18:45 UTCGHSA enrichment
  16. 2026-10-01 06:38 UTCGHSA enrichment
  17. 2026-09-30 18:39 UTCEG score recompute
  18. 2026-09-30 18:39 UTCGHSA enrichment
  19. 2026-09-30 17:37 UTCEG score recompute
  20. 2026-09-30 17:37 UTCGHSA enrichment
  21. 2026-09-30 15:02 UTCEPSS rescore
  22. 2026-09-30 14:36 UTCEG score recompute
  23. 2026-09-30 14:36 UTCGHSA enrichment
  24. 2026-09-30 02:30 UTCEG score recompute
  25. 2026-09-30 01:22 UTCEG score recompute
Show 1 more
  1. 2026-09-30 01:19 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-103088?
CVE-2026-103088 is a high vulnerability published on September 30, 2026. Handlebars.java before 4.5.5 allows directory traversal. In handlebars-springmvc 4.5.3 and 4.5.4, the path-containment fix for CVE-2026-63490 validates template locations as raw percent-encoded strings, whereas the template file is opened through a URL handler that percent-decodes the path. In a…
When was CVE-2026-103088 disclosed?
CVE-2026-103088 was first published on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-103088 actively exploited?
CVE-2026-103088 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (51st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103088?
CVE-2026-103088 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-103088?
A fix for CVE-2026-103088 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-103088 are linked in the Vendor Advisories panel on this page.

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