Secuno
ENNL
Book demo

CVE-2026-1435

Graylog vulnerability

9.8 CRITICALEPSS 0.38%
  1. Published18 Feb 2026

Description

Not properly invalidated session vulnerability in Graylog Web Interface, version 2.2.3, due to incorrect management of session invalidation after new logins. The application generates a new 'sessionId' each time a user authenticates, but does not invalidate previously issued session identifiers, which remain valid even after multiple consecutive logins by the same user. As a result, a stolen or leaked 'sessionId' can continue to be used to authenticate valid requests. Exploiting this vulnerability would allow an attacker with access to the web service/API network (port 9000 or HTTP/S endpoint of the server) to reuse an old session token to gain unauthorized access to the application, interact with the API/web, and compromise the integrity of the affected account.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Graylog2.2.3

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-783579.1
Previously issued authentication tokens are not immediately invalidated when an OTRS…
CVE-2026-1040848.8
SmarterMail before build 9777 contains a privilege escalation vulnerability where JWT…
CVE-2026-1032838.1
Ghost versions 6.20.0 before 6.57.1 contain a session handling vulnerability that…
CVE-2026-888058.1
Incorrect credential cleaning on logout could be used by remote attackers to keep…
CVE-2026-825668.8
The Botslab G980H dash camera firmware contains a session management vulnerability in…
CVE-2026-793139.8
webpy web.py 0.76 is vulnerable to Insufficient Session Expiration. The application's…

Frequently asked

Is CVE-2026-1435 being actively exploited?

CVE-2026-1435 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.38%.

How severe is CVE-2026-1435?

CVE-2026-1435 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.38% probability of exploitation.

Which products are affected by CVE-2026-1435?

Affected products include Graylog.

How do I fix CVE-2026-1435?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-1435 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.