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CVE-2026-10050 critical CVSS 9.1

Vulnerability in org.eclipse.jetty:jetty-security (CVE-2026-10050)

Summary

Vulnerability in org.eclipse.jetty:jetty-security (CVE-2026-10050). Confidential information can be exposed externally. Mitigation: upgrade to 12.1.10 or later.

Original description

The description as published by the source.

Summary

The DigestAuthentication.apply() method in Jetty's HTTP client uses getBytes(StandardCharsets.ISO_8859_1) at three locations (lines 171, 179, 196) to compute Digest auth response hashes. ISO-8859-1 silently replaces any character above U+00FF (Chinese, Japanese, Cyrillic, Arabic, Emoji, etc.) with 0x3F (?), causing all such characters to produce identical hash contributions. An attacker who knows a victim's username can bypass Digest authentication by replacing all non-Latin-1 characters in the password with ? characters, since the collision password produces the same MD5-based Digest response hash as the original password.

Details

Root Cause

In jetty-core/jetty-client/src/main/java/org/eclipse/jetty/client/DigestAuthentication.java, the apply() method computes the three Digest auth hashes (H(A1), H(A2), and the final response) using ISO-8859-1 character encoding:

// Line 171 — H(A1)
String hashA1 = toHexString(digester.digest(a1.getBytes(StandardCharsets.ISO_8859_1)));

// Line 179 — H(A2)
String hashA2 = toHexString(digester.digest(a2.getBytes(StandardCharsets.ISO_8859_1)));

// Line 196 — Final response hash
final String hashA3 = toHexString(digester.digest(a3.getBytes(StandardCharsets.ISO_8859_1)));

ISO-8859-1 (Latin-1) can only encode characters in the range U+0000–U+00FF. Any character outside this range — including all CJK, Cyrillic, Arabic, Greek, Hangul, and emoji characters — is silently replaced with the byte 0x3F (…

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-10050 has been found in org.eclipse.jetty:jetty-security.
Confidential information can be exposed externally. CVSS score: 9.1/10.
What to do: upgrade org.eclipse.jetty:jetty-security to 12.1.10 or later.
If unsure, ask your IT team or search "org.eclipse.jetty:jetty-security CVE-2026-10050" on the vendor's site.

CVE-2026-10050 (org.eclipse.jetty:jetty-security) — CWE-173 / CVSS v3 9.1
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 12.1.10 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-173) exists in org.eclipse.jetty:jetty-security.

📍 Affected scope

Check the vendor advisory for the affected versions of org.eclipse.jetty:jetty-security.

🔥 Severity

Severity: Critical (CVSS 9.1/10). Confidential information can be exposed externally.

🔧 How to fix

Update to 12.1.10.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで org.eclipse.jetty:jetty-security を使っているサービスとバージョンを洗い出す。

  2. 2
    Apply patch patch 
    Upgrade org.eclipse.jetty:jetty-security to 12.1.10

    ステージング環境で 12.1.10 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

maven org.eclipse.jetty:jetty-security
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.1.10"}]}]
maven org.eclipse.jetty.ee8:jetty-ee8-security
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.1.10"}]}]
maven org.eclipse.jetty.ee9:jetty-ee9-security
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.1.10"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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