Security readout for executives and security teams
Plain-English summary
CVE-2026-2369 is a medium-severity libsoup flaw where specially handled zero-length content can trigger a buffer overread. Business impact is mainly possible information exposure or application-level denial of service in software using affected libsoup components. Red Hat currently lists Red Hat Enterprise Linux 10 libsoup3 as affected and RHEL 6-9 libsoup as unaffected.
Executive priority
Treat as a normal-priority vulnerability management item, elevated for RHEL 10 systems supporting internet-facing or business-critical applications. It is not currently supported as actively exploited by the provided sources, but the no-authentication network vector warrants timely tracking and patching once vendor guidance is available.
Technical view
The issue is an integer underflow in libsoup when processing content with a zero-length resource, leading to buffer overread. CVSS 3.1 is 6.5: network reachable, low complexity, no privileges or user interaction, with low confidentiality and availability impact. CWE is CWE-191. Public sources do not provide exploit details or a named fixed version in the supplied data.
Likely exposure
Exposure is most relevant to systems or applications using libsoup3 on Red Hat Enterprise Linux 10. Red Hat marks libsoup on RHEL 6, 7, 8, and 9 as unaffected. Non-Red Hat exposure is not established by the provided sources; check GNOME/libsoup and distribution advisories.
Exploitation context
The CVSS vector indicates potential network-based triggering without authentication or user interaction. The stated outcomes are possible sensitive information access or application-level denial of service. CISA KEV is false in the provided bundle, and no cited source states active exploitation.
Researcher notes
Key unknowns are exact upstream affected versions, fixed commit or release, and distribution-specific backports outside Red Hat. The public description identifies integer underflow and buffer overread on zero-length resources but does not provide enough detail for safe validation beyond package exposure and vendor advisory checks.
Mitigation direction
- Inventory systems running RHEL 10 with the libsoup3 package.
- Monitor Red Hat and GNOME libsoup advisories for fixed package guidance.
- Apply vendor-provided updates when published and approved.
- Prioritize internet-facing or critical applications that rely on libsoup3.
- If no update is available, review vendor guidance for supported workarounds.
Validation and detection
- Confirm installed package names and versions for libsoup3 on RHEL 10 systems.
- Check Red Hat CVE status for current affected and fixed package information.
- Verify RHEL 6-9 systems use packages Red Hat marks unaffected.
- Identify applications dynamically or statically linked against libsoup3.
- Track remediation evidence in vulnerability management records.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-191: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-2369 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L3.92.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://access.redhat.com/security/cve/CVE-2026-2369CVE reference · vdb-entry, x_refsource_REDHAT
- RHBZ#2439091CVE reference · issue-tracking, x_refsource_REDHAT
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/498CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Integer Underflow (Wrap or Wraparound)
Integer Underflow (Wrap or Wraparound) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.