VulnerabilityPublished 13 Aug 2026Updated 29 Aug 2026

CVE-2026-14672: PostgreSQL · Observable Response Discrepancy

Affects PostgreSQLSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium · fixed in 18.6 : update PostgreSQL when convenient.

Data as of 12 Nov 2026, 23:24 UTC

CVSS 3.1 base score

5.3Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 18.6, 17.11, 16.15 +1

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: Low
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: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
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: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
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 13 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 13 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 PostgreSQL to 18.6, 17.11 or 16.15; postgresql/postgresql to 18.5, 17.11 or 16.15.

Affected software

Product	Affected	Fixed in
PostgreSQL	Affected >=18 <18.6	Fixed in 18.6
PostgreSQL	Affected >=17 <17.11	Fixed in 17.11
PostgreSQL	Affected >=16 <16.15	Fixed in 16.15
Postgresqlpostgresql/postgresql`pkg:deb/postgresql/postgresql`Other threats	Affected <16.15 <17.11 <18.5	Fixed in 16.15 17.11 18.5

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

AI-suggested

Patch your PostgreSQL installations to versions 16.15, 17.11, or 18.6 or later where this issue is fixed. Since this is an authentication mechanism discrepancy, upgrading to the fixed versions is the recommended remediation. No vendor advisory content was provided to indicate alternative mitigations or temporary fixes. Patch status is confirmed by the version boundaries stated in the vulnerability description.

Description

CVE-2026-14672 is a medium severity vulnerability in PostgreSQL versions 16 through 18 prior to specific minor releases. It involves an observable response discrepancy in SCRAM authentication that allows unauthenticated users to test for the existence of a database user by observing differences in the SCRAM iteration count. This issue only affects users with non-default scram_iterations settings. Versions before PostgreSQL 16 are not affected.

Impact

An unauthenticated attacker can confirm the existence of a database user account by observing the SCRAM iteration count in the authentication challenge response. This information disclosure could aid in further targeted attacks but does not directly allow authentication or data compromise. The CVSS score is 5.3 (medium severity), reflecting limited confidentiality impact without integrity or availability effects.

References

postgresql.org/support/security/CVE-2026-14672/ (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 13 Sep 2026, 13:04 UTC

Technical details

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