CVE-2026-31215: The nexent v1.7.5.2 backend service contains an unauthorized arbitrary file deletion vulnerability in its Elas

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CRITICAL 9.1REMOTEDOWNGRADE

CVE-2026-31215 is a critical-severity flaw (CVSS 9.1) affecting nexent. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The nexent v1.7.5.2 backend service contains an unauthorized arbitrary file deletion vulnerability in its ElasticSearch service interface. The DELETE /{index_name}/documents endpoint lacks proper authentication and authorization controls and does not validate the user-supplied path_or_url parameter. This allows unauthenticated remote attackers to send crafted requests that trigger the deletion of arbitrary documents from ElasticSearch indices and

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-552
Published	2026-05-12
Last modified	2026-10-19

Publisher (CNA): MITRE · Vendor: nexent

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-12 16:16 UTCPublished CVE record published
2026-10-19 22:10 UTCUpdated Record last modified

nexent nexent DOWNGRADE

Affected: 1.7.5.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7.5.2

1. Check installed version

apt-cache policy nexent || rpm -q nexent || nexent --version

2. No fixed release: DOWNGRADE to a release before 1.7.5.2 (Debian / Ubuntu)

apt-cache madison nexent sudo apt install nexent=<VERSION_BEFORE_1.7.5.2> sudo apt-mark hold nexent

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list nexent sudo dnf downgrade nexent-<VERSION_BEFORE_1.7.5.2> sudo dnf versionlock add nexent

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-31215?

nexent: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-31215 being exploited?

CVE-2026-31215 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-31215 affect?

CVE-2026-31215 affects nexent. Severity is critical (CVSS 9.1). The nexent v1.7.5.2 backend service contains an unauthorized arbitrary file deletion vulnerability in its ElasticSearch service interface. The DELETE /{index_name}/documents endpoint lacks proper authentication and authorization controls an

How urgent is CVE-2026-31215?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Elasticsearch vulnerabilities

Related CVEs

CVE-2026-31216 CRITICAL 9.1 DOWNGRADE The nexent v1.7.5.2 backend service contains an unauthorized arbitrary storage file deletion vulnerability in

References

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