HOMEVULNERABILITIESCVE-2026-34543
HIGH

CVE-2026-34543

CWE-908Published: April 1, 2026· Updated: Apr 7, 2026

7.5
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:12.2th

Official Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From version 3.4.0 to before version 3.4.8, sensitive information from heap memory may be leaked through the decoded pixel data (information disclosure). This occurs under default settings; simply reading a malicious EXR file is sufficient to trigger the issue, without any user interaction. This issue has been patched in version 3.4.8.

NVD Source

Technical Analysis

CVE-2026-34543 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

openexr1 product
openexr
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/AcademySoftwareFoundation/openexr/commit/5f6d0aaa9e43802917af7db90f181e88e083d3b8
ADVISORYhttps://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w-m432
ADVISORYhttps://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w-m432

All References (4)

→
https://github.com/AcademySoftwareFoundation/openexr/commit/5f6d0aaa9e43802917af7db90f181e88e083d3b8Patch
→
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.8Product · Release Notes
→
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w-m432Exploit · Vendor Advisory
→
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w-m432Exploit · Vendor Advisory

Quick Facts

CVE IDCVE-2026-34543
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-908
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedApr 1, 2026

Related CVEs (CWE-908)

CVE-2026-2044
7.8
CVE-2026-45736
7.5
CVE-2025-48513
6.9
CVE-2026-3497
6.9
CVE-2026-58051
6.5
CVE-2025-12736
6.5

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-34543 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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