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No exploitation reportedFix available

CVE-2021-26945

No exploitation reported by the sources we read.

  • Published2021-06-08
  • Fixed in3.0.1
  • WeaknessCWE-190 · CWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An integer overflow leading to a heap-buffer overflow was found in OpenEXR in versions before 3.0.1. An attacker could use this flaw to crash an application compiled with OpenEXR.

Timeline

dates in UTC
  1. 2021-06-0812:15CVE publishedNVD

Versions per branch

NVD
Openexr
BranchAffectedFixed in
3.0< 3.0.13.0.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • openexrUbuntu:Pro:24.04:LTSall versions · no fixed version listed
  • openexrUbuntu:Pro:22.04:LTSall versions · no fixed version listed
  • openexrUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • openexrUbuntu:26.10all versions · no fixed version listed
  • openexrUbuntu:25.10all versions · no fixed version listed
  • openexrDebian:14all versions · fixed in 3.1.5-2
  • openexrDebian:13all versions · fixed in 3.1.5-2
  • openexrDebian:12all versions · fixed in 3.1.5-2

12 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Openexr to 3.0.1

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.15.5read 2026-10-23
  • NVDCVSS 2.04.3read 2026-10-23
  • CNAweakness (CWE)CWE-400known since 2026-10-23
  • NVDweakness (CWE)CWE-190read 2026-10-23
  • FIRST EPSSEPSS score0.7 %2026-11-08
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published
2021-06-08
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-h5g9-4xw7-698r

Frequently asked questions

What is CVE-2021-26945?

An integer overflow leading to a heap-buffer overflow was found in OpenEXR in versions before 3.0.1. An attacker could use this flaw to crash an application compiled with OpenEXR.

Is CVE-2021-26945 actively exploited?

Active exploitation of CVE-2021-26945 has not been confirmed. Its EPSS score was 0.7% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-26945?

CVE-2021-26945 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

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