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The Fix Is Now the Affected Version: Oracle’s Second Java 9.1 in Three Days Deletes a Sectigo Root

Agent & Supply Chain Security by al-ice.ai Editorial

Yesterday we wrote that Oracle’s out-of-cycle Java alert for the eMudhra key compromise was an inventory edit that got a CVSS vector — a trust-store change forced into the shape of a product vulnerability because Java has no other channel through which a revocation decision can reach a running fleet.

Today Oracle published a second one. CVE-2026-114820, Security Alert, Rev 1 Initial Release dated 2026-October-24. Same component, JSSE. Same score, 9.1. Same vector, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. Same empty credit line: “None credited in this Security Alert.”

And the same incident. What makes it worth a post rather than a footnote is the list of versions Oracle marks as affected, and one certificate in the fix that the alert text does not mention at all.

The affected versions are the builds the last alert produced

We read both alert pages and their risk matrices first-hand. Set the two version lists side by side.

The 21 October alert, CVE-2026-91403, named Oracle Java SE 8u511, 8u511-perf, 11.0.33, 17.0.21, 21.0.13, 25.0.5 and 27.0.1; Oracle GraalVM for JDK 17.0.21 and 21.0.13; Oracle GraalVM Enterprise Edition 21.3.20.

Today’s alert, CVE-2026-114820, names Oracle Java SE 8u511-b32, 8u511-perf-b32, 11.0.33.0.2, 17.0.21.0.2, 21.0.13.0.2, 25.0.5.0.2 and 27.0.1.0.2; Oracle GraalVM for JDK 17.0.21.0.2 and 21.0.13.0.2; Oracle GraalVM Enterprise Edition 21.3.20.0.2.

Those .0.2 and -b32 strings are not a coincidence of numbering. We pulled the Oracle release notes for JDK 25.0.5.0.2 and JDK 8u511 b32 directly: both carry the release date October 21, 2026, and both close with the line “This release also contains the fix for the security vulnerability described in the Oracle Security Alert Advisory - CVE-2026-91403.” They are the builds the first alert shipped.

So the remediation for the first Security Alert is the affected-version list of the second, three days later. An operator who moved fast on 21 October did not land anywhere stable; they landed on the input to the next alert. Oracle does not say this anywhere — the version strings say it.

Fingerprints on Tuesday, trust anchors on Saturday

The more substantive change is what the two fixes actually do to the JDK, which is visible only in the release notes and not in either alert.

The 21 October builds, per the 25.0.5.0.2 notes under security-libs/java.security, carry a note titled “eMudhra Intermediate Certificate Authorities Are Distrusted” against bug JDK-8395555 (not public; the JDK 8 line records the same change as JDK-8395593). The text: “The distrust includes 8 eMudhra intermediate CA certificates and 8 certificates cross-signed by Sectigo. The certificates have been blocked by adding them to the lib/security/blocked.certs file.” On JDK 8 the same file is lib/security/blacklisted.certs. The notes spell out the effect in both directions: a TLS session will not be negotiated if the server’s chain contains one of the blocked certificates, and jarsigner -verify -strict will fail on a JAR signed through one.

That is a deny-list keyed to specific certificates. It is additive, precise and reversible, and it leaves every root in cacerts exactly where it was.

Today’s builds do something categorically different. The 25.0.5.0.3, 21.0.13.0.3, 27.0.1.0.3 and 8u511 b33 release notes — all dated October 24, 2026 — carry a single new note, JDK-8395690 (not public), titled “Removal of eMudhra and Comodo (owned by Sectigo) AAA Root Certificates”. Four trust anchors are deleted from the cacerts keystore, quoted from Oracle’s notes verbatim:

  • emsigneccrootcag3 [jdk] — CN=emSign ECC Root CA - G3, O=eMudhra Technologies Limited, OU=emSign PKI, C=IN
  • emsignrootcag1 [jdk] — CN=emSign Root CA - G1, O=eMudhra Technologies Limited, OU=emSign PKI, C=IN
  • emsignrootcag2 [jdk] — CN=emSign Root CA - G2, O=eMudhra Technologies Limited, OU=emSign PKI, C=IN
  • comodoaaaca [jdk] — CN=AAA Certificate Services, O=Comodo CA Limited, L=Salford, ST=Greater Manchester, C=GB

The new security baselines, per the 27.0.1.0.3 notes, are 27.0.1.0.3+1, 25.0.5.0.3+1, 21.0.13.0.3+1, 17.0.21.0.3+1, 11.0.33.0.3+1 and 1.8.0_511-b33.

Three days, one incident, two opposite mechanisms. Our reading, and it is a reading rather than an Oracle statement: the first response blocked the certificates Oracle knew about, and the second removed the issuing paths those certificates came from. Blocking eight cross-signed copies by fingerprint stops those eight. It does not stop a ninth.

The certificate the alert does not name

Three of the four removed anchors are eMudhra roots and need no explanation. The fourth is not an eMudhra certificate at all.

AAA Certificate Services is Sectigo’s legacy Comodo-era root, and it is the cross-signing anchor in this incident. Canonical states the relationship plainly in its own advisory, which we read first-hand: “While the eMudhra CA is not directly trusted as a root on Ubuntu, two other root CAs have cross-signed the eMudhra CA: emSign Root TLS CA – G3 and Comodo AAA Certificate Services. These two roots have been removed from the Ubuntu trusted root stores to ensure that the compromised eMudhra CA is no longer trusted.” Canonical also records the consequence without varnish: “Any legitimate certificate which is ultimately trusted by either of these two root CAs would no longer be trusted. It is unlikely, but this may result in some hosts being unreachable.”

Oracle has now reached the same conclusion for the JDK’s own bundled store. What Oracle has not done is say so in the place most people will look. The Security Alert describes the fix as “providing Java updates which removes the set of impacted root CA certificates related to eMudhra.” Comodo is not mentioned. Sectigo is not mentioned. The NVD record — published 2026-10-24T19:17:04.413, status Received, source secalert_us@oracle.com, which we pulled directly from the 2.0 API — reproduces Oracle’s description and carries exactly one reference: the alert page. An operator reading the CVE, or a feed ingesting it, is told that some eMudhra roots are going away. They are not told that a Sectigo root is going away with them.

That gap is the load-bearing finding here, and it is the same shape we logged in the brotli rescope and in PHP’s configuration-only advisory: the consequential detail exists, but it lives in free text one layer below the identifier that automation actually reads.

How much this breaks, stated honestly

It is tempting to call the removal of a widely deployed legacy root a compatibility event and leave it there. The real answer is narrower, and the narrowing matters.

Per Sectigo’s own root documentation, which we read first-hand, each of its four modern roots — USERTrust RSA, USERTrust ECC, COMODO RSA and COMODO ECC — is cross-signed by AAA Certificate Services specifically to extend trust to old clients. Sectigo’s compatibility table names the platforms that depend on that path, and one of the entries is Oracle Java JRE 1.5.0_08. Sectigo also states that the AAA root “expires in 2028 but will be retired before that date.” Canonical notes that AAA had already been dropped from Ubuntu’s bundles in 22.04 and newer, long before this incident.

In a current JDK the four modern Sectigo roots are present as trust anchors in their own right, so an ordinary chain to a Sectigo-issued certificate terminates at a modern root and never needs AAA. The breakage case is specific: a chain that can only terminate at AAA Certificate Services, which in practice means a server configured to send the legacy cross-certificate path, or a client whose store predates the modern roots. That is a real population, and it is much smaller than “everyone using Sectigo.” We would rather say that than inflate it.

One more honest limit. Oracle’s removal set includes emSign Root CA - G2, which was not in the four roots certifi pulled on 18 October, and does not include emSign Root CA - C1 or emSign ECC Root CA - C3, which were. Three trust stores responding to one incident have now converged on three different subsets of the same hierarchy. We have no evidence any of them is wrong; we note that “patched” now means something slightly different in each.

What an unpatched store still looks like

To put a number on the exposure rather than assert it, we inspected the JDK on our own workstation — our machine, no third-party system touched. The Debian-packaged OpenJDK 25 at /usr/lib/jvm/java-1.25.0-openjdk-amd64 draws its cacerts from the system ca-certificates store; every entry in it carries the snapshot date Jul 20, 2026. Listing it with keytool returns, among others, debian:comodo_aaa_services_root.pem, debian:emsign_ecc_root_ca_-_g3.pem, debian:emsign_root_ca_-_g1.pem, debian:emsign_root_ca_-_c1.pem and debian:emsign_ecc_root_ca_-_c3.pem — alongside usertrust_rsa, usertrust_ecc, comodo_rsa and comodo_ecc.

That is an unremarkable, current-major-version JDK on an unpatched host, and it trusts both the root above the compromised intermediates and the root that cross-signed them. It also, usefully, demonstrates the bound from the previous section: the four modern Sectigo anchors are right there, so removing AAA from this store would cost it nothing for normal Sectigo chains.

Canonical’s advisory is worth reading on this point too, because it makes the distribution split explicit: OpenJDK as shipped by Ubuntu uses the system root store rather than a bundled one, so it is not covered by Oracle’s alert — but Canonical still says the Java root store “requires manual action” to synchronise. Whether your Java reads a vendor cacerts or the OS store decides which of these two remediation paths applies to you, and it is not a question most inventories can answer.

The structural point, restated

Yesterday’s version of this argument was that a CA bundle has no vocabulary for revoking an intermediate, so every ecosystem had to delete roots instead. Today adds a corollary.

Because the trust store ships as part of a product, every revision of a trust decision also ships as part of a product. Oracle did not get one CVE for the eMudhra compromise; it got two, three days apart, with identical scores and identical empty credit lines, because its understanding of the blast radius changed once. A browser root program that refined the same judgement would have pushed an updated OneCRL or CRLSet entry and nobody would have filed anything. In Java, refining the judgement means a new identifier, a new risk matrix, a new set of builds, a new baseline table, and a second patch cycle for every operator who already completed the first one.

That asymmetry is the cost of a static trust store, and it is paid every time, by everyone, regardless of whether the revision was large or small. This one was small. It still cost a 9.1.

What to do

  • If you patched for CVE-2026-91403, you are in scope again. This is the counter-intuitive part and the reason to act rather than file. Oracle names the .0.2 and -b32 builds as affected; the fixed builds are 27.0.1.0.3, 25.0.5.0.3, 21.0.13.0.3, 17.0.21.0.3, 11.0.33.0.3 and 1.8.0_511-b33.
  • Before deploying, find out whether anything you talk to chains through AAA Certificate Services. This update deletes a trust anchor; unlike the 21 October change it can take working connections offline. The chain to check is any Sectigo-issued certificate whose server-sent path terminates at AAA rather than at USERTrust or COMODO.
  • Do not infer the fix from the CVE text. The alert says eMudhra roots. The release notes say eMudhra roots and Comodo AAA Certificate Services. If your change-advisory process reads advisories and not release notes, it will approve a Sectigo root removal without knowing it did.
  • Establish which store each Java process actually reads. A vendor JDK uses bundled cacerts and needs the Oracle build. A distribution OpenJDK may be wired to the OS store and needs the distribution’s ca-certificates update plus, per Canonical, a manual synchronisation step. Patching one and assuming the other is the failure mode here.
  • Expect the subsets to keep diverging. Oracle removed G1, G2 and ECC G3; certifi currently excludes only ECC G3; Ubuntu removed emSign Root TLS CA – G3 and AAA. Reconcile against your own chains, not against another ecosystem’s list.

The first alert was the trust store being edited. The second is the trust store being edited again, because the first edit was scoped to the certificates anyone had enumerated. Neither is a bug in JSSE. Both are 9.1s, and there is no mechanism in Java that would have let either of them be anything else.

Our verification was read-only. The Oracle Security Alert for CVE-2026-114820 — its description, credit statement, modification history and full risk-matrix row including the CVSS 3.1 vector and the affected-version strings — was read first-hand from Oracle’s advisory page, as was the 21 October alert for CVE-2026-91403 for comparison. The release notes for JDK 25.0.5.0.2, 8u511 b32, 25.0.5.0.3, 21.0.13.0.3, 27.0.1.0.3 and 8u511 b33 were each fetched and read first-hand; the release dates, full version strings, security-baseline tables, JDK bug identifiers and the quoted certificate removal list are taken verbatim from them. The CVE record, its publication timestamp, status, source identifier and sole reference were pulled directly from the NVD 2.0 API. Canonical’s advisory and Sectigo’s root-certificate documentation were read first-hand and are quoted as those organisations’ own statements. The cacerts listing is from our own workstation’s Debian-packaged OpenJDK 25 and is reported as a single local observation, not as a survey. The readings labelled as ours — that the second alert’s affected list is the first alert’s output, that the mechanism moved from fingerprint blocking to anchor removal, that the AAA removal is absent from the advisory and NVD text, and that the compatibility impact is bounded by the presence of the modern Sectigo anchors — are analysis, not vendor statements. The Oracle Security blog and the ops.java/emudhra reference cited by both alerts returned error pages when we fetched them and are not relied on. No certificate authority, relying party, Java deployment or third-party host was probed, no certificate was forged or submitted for validation, and no exploit or proof-of-concept was written, obtained or run. Brave Search was used for discovery only; every consequential claim was re-verified against the primary source.

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