CVE-2026-123615
Heap OOB read/write in imgproxy ICO loader allows remote crash (unauthenticated DoS).
do firstUpgrade to a fixed release: 4.0.17.
Is CVE-2026-123615 being exploited?
Not confirmed. CVE-2026-123615 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.53% probability of exploitation in the next 30 days.
How severe is CVE-2026-123615?
CVE-2026-123615 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-123615?
Yes. A fix has been recorded for CVE-2026-123615. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-123615 affect?
CVE-2026-123615 affects imgproxy < 4.0.17 (ICO loader), vips/icoload.c (vips_foreign_load_ico_header). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-123615?
Upgrade imgproxy to >= 4.0.17; block/scan untrusted ICO uploads.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote heap corruption via crafted ICO images causing worker crash and glibc abort (remote DoS); may corrupt heap metadata.
Patch when possible
- affected>= 3.3.0 and < 4.0.17
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
timeline
- 8 Nov 2026Published
- 8 Nov 2026CVE record last updated · same day later
- 10 Nov 2026Analysed by vulneraibility.com · 3 days later
also known as
- Advisorygithub.com /imgproxy/imgproxy/security/advisories/GHSA-494m-4556-wf5p
- Advisoryvulncheck.com /advisories/imgproxy-before-4.0.17-out-of-bounds-write-in-ico-loader
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- FIRST EPSS: exploit probability and percentile
- OSV: advisory aliases and downstream package versions
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.