CVE Explorer
CVE-2026-26981
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.3.0 through 3.3.6 and 3.4.0 through 3.4.4, a heap-buffer-overflow (OOB read) occurs in the `istream_nonparallel_read` function in `ImfContextInit.cpp` when parsing a malformed EXR file through a memory-mapped `IStream`. A signed integer subtraction produces a negative value that is implicitly converted to `size_t`, resulting in a massive l
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"openexr","vendor":"AcademySoftwareFoundation","versions":[{"status":"affected","version":">= 3.3.0, < 3.3.7"},{"status":"affected","version":">= 3.4.0, < 3.4.5"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:a71df7bdc005dde55e6a271849e5b4ff7a4ea5cc533003c3fb91a4db52d8c748 · sha256:bd2e0d3b53774206… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:a71df7bdc005dde55e6a271849e5b4ff7a4ea5cc533003c3fb91a4db52d8c748 · sha256:bd2e0d3b53774206… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-195","description":"CWE-195: Signed to Unsigned Conversion Error","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:a71df7bdc005dde55e6a271849e5b4ff7a4ea5cc533003c3fb91a4db52d8c748 · sha256:bd2e0d3b53774206… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"https://github.com/AcademySoftwareFoundation/openexr/commit/6bb2ddf1068573d073edf81270a015b38cc05cef","tags":["x_refsource_MISC"],"url":"https://github.com/AcademySoftwareFoundation/openexr/commit/6bb2ddf1068573d073edf81270a015b38cc05cef"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:a71df7bdc005dde55e6a271849e5b4ff7a4ea5cc533003c3fb91a4db52d8c748 · sha256:bd2e0d3b53774206… · /containers/cna/references/1
{"name":"https://github.com/AcademySoftwareFoundation/openexr/commit/d2be382758adc3e9ab83a3de35138ec28d93ebd8","tags":["x_refsource_MISC"],"url":"https://github.com/AcademySoftwareFoundation/openexr/commit/d2be382758adc3e9ab83a3de35138ec28d93ebd8"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:a71df7bdc005dde55e6a271849e5b4ff7a4ea5cc533003c3fb91a4db52d8c748 · sha256:bd2e0d3b53774206… · /containers/cna/references/2
{"name":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-q6vj-wxvf-5m8c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-q6vj-wxvf-5m8c"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:a71df7bdc005dde55e6a271849e5b4ff7a4ea5cc533003c3fb91a4db52d8c748 · sha256:bd2e0d3b53774206… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.