CVE-2026-20635: apple ios and ipados
CVSS: 4.3v3.1MediumModified
AliasesUBUNTU-CVE-2026-20635DEBIAN-CVE-2026-20635CGA-2pgh-rppq-rwhjCGA-2qj4-pq26-fqwfCGA-2w5g-hff4-q39cCGA-3mrj-vhhg-q5xvCGA-3p55-x84x-p67jCGA-544m-g84q-64hcCGA-5q64-rq3x-j2rgCGA-5x7h-h5r4-qgqmCGA-6r99-ghcc-w48mCGA-6rhc-95xg-jcqgCGA-75hw-vq2x-3g47CGA-7m33-74wc-9pjcCGA-7v23-2283-4cp6CGA-87qf-496f-379rCGA-89x6-pxmw-h3w4CGA-8mwf-497w-5w6fCGA-96h9-f9wq-q3whCGA-9ccv-vhxg-f6wcCGA-9wjq-385c-8vc4CGA-cfcq-qm47-xm9gCGA-cp3m-vgr6-q5g7CGA-cr53-r3xr-h4jgCGA-crxw-gr65-prxxCGA-f2c7-f23q-x2gxCGA-f2pf-cmm9-6pmrCGA-f8p7-v7gx-q8cjCGA-ffp2-9hrh-9v82CGA-fvg7-rcvp-v3w5CGA-fw3j-c275-5cvcCGA-g22g-g3r9-2w6fCGA-g5x7-x499-r24hCGA-gf82-wcj6-2mgmCGA-ggxp-j6wm-9g45CGA-gxgw-mqrf-4658CGA-h37p-gw3p-4f85CGA-h4xj-6wvx-2x5hCGA-h7mm-qw42-vxvrCGA-hjjm-3xp6-v7vxCGA-hr5m-vxfj-h773CGA-hvw3-jxv6-hxpjCGA-jj4q-jjmm-g8mjCGA-jq94-m3r4-jw34CGA-jqjm-w2qg-f56vCGA-jqvw-rmx5-wr75CGA-jrr3-4wq6-qp33CGA-m7mf-jf5h-4jmqCGA-m7rx-hc26-3g4gCGA-mh88-h6r7-hh7fCGA-mp73-4hx6-68q7CGA-mxpf-cp5m-66gpCGA-p5cc-vrch-x2vcCGA-pgr9-xjg9-vrhfCGA-pj8p-rfq4-vm8hCGA-prqw-w8jr-pjfjCGA-pvhv-w7c3-g7r3CGA-q276-gv4f-mq47CGA-q96g-8rhc-h4r9CGA-qc5g-jjp8-8m58CGA-qhq2-c96m-rf24CGA-qhw8-wpgj-xj3pCGA-r3wj-hxqq-4m62CGA-r65x-9wh8-469wCGA-r6v3-8m84-7jg5CGA-r734-9w5j-7xv9CGA-r84x-2hvv-m7jcCGA-rfh6-wgrm-grx8CGA-rh9h-fmh4-vxgmCGA-vvgr-hpmh-965gCGA-vvxp-x3vr-w3mxCGA-w3jh-6gmq-rmm8CGA-w6fc-6mx6-8m2gCGA-wh2r-9hv4-m634CGA-wpj7-3gmp-xwfxCGA-wvpf-qcpr-rgf3CGA-ww3j-27h8-75fxCGA-wxmq-28fr-mgqjCGA-x38g-7fmv-4q66CGA-x67q-vh4h-54cj
Published 11-02-2026Last modified 15-07-2026
Vulnerability summary
CVE-2026-20635 is a medium (CVSS 4.3) vulnerability in apple ios and ipados. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.6% of scored vulnerabilities.
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)EPSS score
0.35%
0%100%
Low · +0.05 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 18 · Related 7DSA-6172-1MGASA-2026-0064OPENSUSE-SU-2026:20518-1RHSA-2026:10702RHSA-2026:11329RHSA-2026:11814RHSA-2026:13845RHSA-2026:14659RHSA-2026:16056RHSA-2026:16695RHSA-2026:19206RHSA-2026:19535RHSA-2026:22136RHSA-2026:9692SUSE-SU-2026:1139-1SUSE-SU-2026:1150-1SUSE-SU-2026:1364-1SUSE-SU-2026:21180-1CGA-GQP6-M3CG-C6QXUSN-8237-1
Timeline
- 11-02-2026PublishedVulnerability first disclosed.
- 15-07-2026Last modifiedVulnerability information updated.
Description
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
CVSS metrics
5 scores · 5 sources · 1 versionMedium 4.3Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:LSources5 sources · 4.3–8.8
- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HDiffers
- OSV · DebianEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- OSV · ChainguardEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- NVDNIST4.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
EPSS trend
Probability
0.35%
Chance of exploitation in the next 30 days
Percentile
28%
Versus all other CVEs
30-day change
+0.05 pp
From 0.31% on 19-09-2026
19-09-202619-10-2026
EPSS score0.35%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
- CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
Affected systems
Chainguard39 products
- openjdk-11-openj9< 0.59.0-r2
- openjdk-11-openj9-dbg< 0.59.0-r2
- openjdk-11-openj9-default-jdk< 0.59.0-r2
- openjdk-11-openj9-default-jvm< 0.59.0-r2
- openjdk-11-openj9-doc< 0.59.0-r2
Apple8 products
- ios and ipados< 18.7.5 | < 26.3
- ipados< 18.7.5 | ≥ 26.0, < 26.3
- iphone_os< 18.7.5 | ≥ 26.0, < 26.3
- macos< 26.3
- safari< 26.3
Ubuntu5 products
- qtwebkit-opensource-srcAll versions (No fix recorded)
- qtwebkit-sourceAll versions (No fix recorded)
- webkit2gtkAll versions (No fix recorded) | < 2.52.3-0ubuntu0.24.04.1 | < 2.52.3-0ubuntu0.25.10.1
- webkitgtkAll versions (No fix recorded)
- wpewebkitAll versions (No fix recorded)
Debian2 products
- webkit2gtk< 2.50.6-1~deb12u1 | < 2.50.6-1~deb13u1 | < 2.50.6-1
- wpewebkitAll versions (No fix recorded) | < 2.50.6-1
4 vendors · 54 products
