High 7.5Published Jul 10, 2026

CVE-2026-55687ESF-IDF: Stack-Based Out-of-Bounds Write in JPEG Decoder DQT Marker Parsing

Updated under an hour ago (Oct 28, 2026, 6:50 AM ET)

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Every CVE for espressif esp-idf

Exploited in the last 30 days

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. Versions 6.0.1, 5.5.4, 5.4.4, 5.3.5, and possibly prior contain an out-of-bounds write in jpeg_parse_dqt_marker() in components/esp_driver_jpeg/jpeg_parse_marker.c because the attacker-controlled DQT marker Tq nibble is used as an index into the qt_tbl array without validating that it is in the range 0..3, allowing malformed JPEG input to corrupt stack memory and reliably trigger a denial of service. This issue is fixed in version 6.0.2 and is expected to be fixed in versions 5.5.5, 5.4.5, and 5.3.6.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-121, CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

espressif esp-idf espressif:esp_idf (from the name)	from 6.0.0, < 6.0.2; from 5.5.0, <= 5.5.4; from 5.4.0, <= 5.4.4; through 5.3.5	CNA record

References

References

https://github.com/espressif/esp-idf/security/advisories/GHSA-v6r2-f6p2-88cj	x-refsource-confirm
https://github.com/espressif/esp-idf/commit/303c01305acb8ae5c4eb24a1786300681b4822a4	x-refsource-misc
https://github.com/espressif/esp-idf/commit/6ffafe8e93142ef8ffe51a6311d4abfc0f10fe77	x-refsource-misc
https://github.com/espressif/esp-idf/commit/7ccfc00f39faf1b7e5919f45b56fe44ba699d7c1	x-refsource-misc
https://github.com/espressif/esp-idf/commit/82c5c2dad45313786fb7e973059bc9094d95c3b2	x-refsource-misc
https://github.com/espressif/esp-idf/commit/f2df45bcedef11354e83c31a9718d680a68422c4	x-refsource-misc
https://github.com/espressif/esp-idf/releases/tag/v6.0.2	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.