VulnerabilityPublished 18 Aug 2026Updated 9 Nov 2026

CVE-2026-61308: Openjdk 8 · Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise

Affects openjdk-8Source GCVE Database

Compare

Authoritative record:CVE-2026-61308· Medium 6.8

Not known to be exploited · CVSS 6.8 Medium · fixed in 8u504-ga-1ubuntu1~16.04.3 : update openjdk-8 when convenient.

Data as of 10 Nov 2026, 06:10 UTC

CVSS 3.1 base score

6.8Medium

How severe the flaw is on the 0–10 CVSS scale.

Patch: Available – fixed in 8u504-ga-1ubuntu1~16.04.3, 11.0.32.1+1-1ubuntu1~18.04, 8u504-ga-1ubuntu1~18.04.3 +11

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector: Network
Attack Complexity: High
Privileges Required: None
User Interaction: None
Scope: Changed
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: High: A successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected. For example, a successful attack may require an attacker to: gather knowledge about the environment in which the vulnerable target/component exists; prepare the target environment to improve exploit reliability; or inject themselves into the logical network path between the target and the resource requested by the victim in order to read and/or modify network communications (e.g., a man in the middle attack).
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Patches and advisories

Affected software

Product	Affected	Fixed in
Ubuntu 26.10openjdk-17`pkg:deb/ubuntu/openjdk-17?arch=source&distro=stonking`Other threats	Affected 17.0.18+8-1 – 17.0.21~6ea-1 7 affected builds	Fixed in–
Ubuntu 26.10openjdk-17-crac`pkg:deb/ubuntu/openjdk-17-crac?arch=source&distro=stonking`Other threats	Affected =17.0.18+8-0ubuntu1 =17.0.19+10-0ubuntu1 =17.0.20+8-0ubuntu1	Fixed in–
Ubuntu 26.10openjdk-21`pkg:deb/ubuntu/openjdk-21?arch=source&distro=stonking`Other threats	Affected 21.0.11+10-1 – 21.0.13.0.3+1-1~26.10.1 6 affected builds	Fixed in–
Ubuntu 26.10openjdk-21-crac`pkg:deb/ubuntu/openjdk-21-crac?arch=source&distro=stonking`Other threats	Affected =21.0.10+7-0ubuntu1 =21.0.11+10-0ubuntu1 =21.0.12+8-0ubuntu1	Fixed in–
Ubuntu 26.04 LTSopenjdk-17`pkg:deb/ubuntu/openjdk-17?arch=source&distro=resolute`Other threats	Affected 17.0.17+10-1 – 17.0.21.0.3+1-1~26.04.1 8 affected builds	Fixed in–
Ubuntu 26.04 LTSopenjdk-17-crac`pkg:deb/ubuntu/openjdk-17-crac?arch=source&distro=resolute`Other threats	Affected 17.0.16+8-0ubuntu1 – 17.0.20+8-0ubuntu1~26.04 5 affected builds	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Oracle has released official patches for all affected versions as part of the August 2026 Critical Security Patch Update. Users should apply these patches promptly to mitigate the vulnerability. The vendor strongly recommends remaining on actively supported versions and applying security patches without delay. No additional mitigations are specified beyond applying the official fixes.

Description

A vulnerability exists in the Networking component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition affecting multiple supported versions including Java SE 8u501, 11.0.32, 17.0.20, and others. The flaw allows a remote unauthenticated attacker with network access via HTTP to potentially gain unauthorized access to critical or all accessible data. The vulnerability impacts confidentiality but not integrity or availability. It can be exploited through APIs, including those used by sandboxed Java Web Start applications or applets that run untrusted code. The CVSS 3.1 base score is 6.8 (medium severity). Oracle has released patches for the affected versions, and users are strongly advised to apply these updates promptly.

Impact

Successful exploitation can lead to unauthorized access to critical or all accessible data within Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition environments. The vulnerability impacts confidentiality but does not affect integrity or availability. The scope of impact extends beyond the Java SE products themselves, potentially affecting additional products that rely on these Java components.

References

Community reviews

Loading reviews…