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Vulnerability Database · Debian · Package report

openjdk-21: vulnerability history, versions and safety

openjdk-21 is a package in the Debian ecosystem. Vulert records 8 vulnerabilities for it across 26 releases, from Jan 2023 to Oct 2026. Each vulnerability names the versions it affects, the fixed version to move to, and a workaround where no fix has been published.

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8 vulnerabilities recorded U8
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4 with no fix published

No patched version yet — these are the ones to plan around.

See the unfixed vulnerabilities →
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5 in the last 12 months

Most recent disclosure 22 Oct 2026.

See the disclosure history →
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0 malicious-package vulnerabilities

No published version shipped hostile code.

See all openjdk-21 vulnerabilities

Vulert verdict on openjdk-21 i

Updated on 23 Oct 2026

Careful: 4 of the 8 vulnerabilities Vulert records for this package have no fix yet. Plan around those, or apply the workaround listed for each. The rest have a fixed version to move to.

Long-term outlook: usable, but needs attention 8 vulnerabilities on record across 3 years, 5 in the last year.

What to do: Plan around the 4 vulnerabilities with no published fix: each lists the affected range and any workaround that reduces exposure. No fix yet: Vulert alerts you the moment one is published. Monitor it with Vulert →

  • Vulnerabilities on record 8 over 3 years · 5 in the last year i
  • Latest disclosure 22 Oct 2026 i
  • Highest CVSS 5.3 i
  • With no published fix 4 i

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01 Versions

Which versions are affected

Every version Vulert holds for openjdk-21, newest first, with the vulnerabilities that name it. A version with a count of zero has no recorded vulnerabilities; open a version to see the vulnerabilities it is exposed to.

Newest 26 of 26 versions on record. Severity counts are the vulnerabilities recorded against that exact release.

02 Disclosure history

How often vulnerabilities are recorded

  • 2023 2
  • 2025 2
  • 2026 4

Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 5 of the 8 were recorded in the last 12 months.

03 Vulnerabilities

Recorded vulnerabilities for openjdk-21

The 5 most severe of 8 vulnerabilities recorded for this package

Search all 8 in the database →
Vulnerability Severity Fixed version ↓ Disclosed ↓
Unauthorized Access Vulnerability in Oracle Java SE and GraalVM - CVE-2023-21830 5.3 medium 21~7ea-1 18 Jan 2023
Critical Vulnerability in OpenJDK 21 and 25: Unauthorized Access Risk 3.7 low No fix published 21 Oct 2025
Unauthorized Access Vulnerability in OpenJDK-21: CVE-2023-21830 N/A unrated 21~7ea-1 18 Jan 2023
Critical Security Update for OpenJDK-21: Addressing Multiple Vulnerabilities N/A unrated 21.0.9+10-1~deb13u1 24 Oct 2025
Critical Security Update for OpenJDK-21: Addressing Multiple Vulnerabilities N/A unrated 21.0.10+7-1~deb13u1 27 Jan 2026

Vulnerability wrong, a fix missing, or a package we should cover? Report it and we will fix the record. Report Vulnerability Provide Feedback

Updated: 23/Oct/2026 · Vulnerabilities in our DB: 524315

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Questions

About openjdk-21

Is openjdk-21 safe to use?

Vulert records 8 vulnerabilities for openjdk-21 in Debian: 0 critical, 0 high, 0 medium and 0 low, plus 8 not yet rated. 4 of them have no published fix yet, so those are the ones to avoid or mitigate.

How many vulnerabilities does openjdk-21 have?

8 vulnerabilities are recorded for openjdk-21 in the Debian ecosystem: 0 critical, 0 high, 0 medium and 0 low, plus 8 not yet rated. The ledger on this page lists the same counts next to the date of the most recent disclosure.

How often are new openjdk-21 vulnerabilities disclosed?

5 vulnerabilities were recorded for openjdk-21 in the last 12 months, and the oldest entry in this database dates to 18 Jan 2023. Recency matters more than a lifetime total: it shows how actively new issues are being disclosed for the package you are considering.

Which versions of openjdk-21 are affected?

Each vulnerability on this page lists the affected version range and the fixed version to move to. Open the vulnerability for the version you actually run — fixes are specific to a release line, not to the package as a whole.

How do I monitor openjdk-21 for upcoming vulnerabilities?

Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the openjdk-21 version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.