CVE-2026-5888General(apple / chrome)

LOWCVSS 6.5 · MEDIUM

Signal is active with 3 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Uninitialized Use in WebCodecs in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Medium)

apple CVEs Back to dashboard

1.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.html

Other references

https://issues.chromium.org/issues/486506202

Weakness type (CWE)

CWE-457

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

chrome
linux_kernel
macos
windows

Threat summary

6 mentions across 4 observed days
Momentum state: stable

What's happening

Technical details provided in 3 signals
General: 4 classified signals
Disclosure: 2 classified signals
Peaked at 3 mentions on most recent observed day (2026-05-10)
6 total mentions across 4 days

Affected systems

Vendors

apple google linux microsoft

Products

chromelinux_kernelmacoswindows

1 version affected across 4 products

Deep dive

Activity timeline6 mentions / 4d

Signal classification2 categories

General

466.7%

Disclosure

233.3%

Referenced assets1 URL

By indicator

https://nvd.nist.gov/vuln/detail/CVE-2026-5888

Classification over time

Date	Total	Labels

2026-04-20	1	Disclosure1
2026-04-21	1	General1
2026-05-07	1	General1
2026-05-10	3	Disclosure1General2

Full discourse6 posts

Octane Security@octane_security156d
General
Claim: AI-native security analysis can outperform legacy workflows on mission-critical code Evidence: Octane surfaced CVE-2026-5888 in @ChromiumDev, plus memory disclosures in @firefox and @Apple Safari’s WebKit Inference: Discovery is no longer the bottleneck. Validation is
Post summary
The statement notes that Octane surfacing CVE‑2026‑5888 and memory disclosures, but provides no detailed technical or exploit information.
2502042.1K
5.8K followersView on X
Octane Security@octane_security172d
Disclosure
CVE-2026-5888 Chromium powers @googlechrome, @brave, @opera, @MicrosoftEdge, and many more browsers. We found a WebCodecs heap disclosure in VideoFrame.copyTo(codedRect). This would have allowed a website to copy out bytes from renderer memory that should never be exposed to JavaScript. This can expose sensitive process data and help attackers understand the renderer’s memory layout, which can make more serious exploit chains easier to pull off. https://nvd.nist.gov/vuln/detail/CVE-2026-5888
Post summary
A WebCodecs heap disclosure in Chromium’s VideoFrame.copyTo allows websites to read sensitive renderer memory, potentially aiding more serious exploit chains. No PoC, exploit, patch, or active exploitation reported.
10080355
5.8K followersView on X
mayank@exec_mayank172d
General
@giovignone what was the issue? the only one i found by octane security was this medium issue -- [TBD][486506202] Medium CVE-2026-5888: Uninitialized Use in WebCodecs. Reported by Identified by the Octane Security Team: Giovanni Vignone, Paolo Gentry, Robert van Eijk on 2026-02-22
Post summary
The tweet refers to the medium‑severity CVE‑2026‑5888 reported by Octane Security, describing an uninitialized use in WebCodecs. No proof‑of‑concept, exploit, patch, or active exploitation details are provided.
1001091
122 followersView on X
Lyrie.ai@lyrie_ai153d
General
@ChromiumDev @firefox @Apple Evidence: Octane surfaced CVE-2026-5888 in @ChromiumDev, plus memory disclosures in @firefox and @Apple Safari’s WebKit Source: X search for CVE-2026 critical Posted: 2026-05-07T17:38:15.000Z Likes: 13
Post summary
The tweet notes that Octane detected CVE‑2026‑5888 in Chromium and also found memory disclosures in Firefox and Safari's WebKit, but offers no additional technical details or evidence of exploitation.
0000034
197 followersView on X
Lyrie.ai@lyrie_ai153d
Disclosure
@ChromiumDev @firefox @Apple Source: X search for CVE-2026 critical Posted: 2026-05-07T17:38:15.000Z Likes: 13 Claim: AI-native security analysis can outperform legacy workflows on mission-critical code Evidence: Octane surfaced CVE-2026-5888 in @ChromiumDev, plus memory disclosures in @firefox…
Post summary
The post reports that Octane identified CVE-2026-5888 in Chromium and notes memory disclosures in Firefox, but provides no exploit code, patch info, or evidence of active exploitation.
0000036
197 followersView on X
Lyrie.ai@lyrie_ai153d
General
CVE-2026-5888: Claim: AI-native security analysis can outperform legacy workflows on mission-critical code Evidence: Octane surfaced CVE-2026-5888 in @ChromiumDev, plus memory disclosures in @firefox and @Apple Safari’s WebKit Inference: Discovery is no longer the…
Post summary
The tweet references CVE-2026-5888 in Chromium, Firefox, and Safari with memory disclosure evidence, but it offers no detailed technical info, exploit code, patch, or active exploitation claim.
0000039
197 followersView on X

CPE platform detail4 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

4 of 4 entries

Part	Vendor	Product	Version	Target SW	Target HW
OS	apple	macos	-	-	-
App	google	chrome	-	-	-
OS	linux	linux_kernel	-	-	-
OS	microsoft	windows	-	-	-

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What researchers are saying

CVE-2026-5888

Octane Security[verified]@octane_securityGeneral

The statement notes that Octane surfacing CVE‑2026‑5888 and memory disclosures, but provides no detailed technical or exploit information.

Octane Security[verified]@octane_securityDisclosure

A WebCodecs heap disclosure in Chromium’s VideoFrame.copyTo allows websites to read sensitive renderer memory, potentially aiding more serious exploit chains. No PoC, exploit, patch, or active exploitation reported.

Lyrie.ai[verified]@lyrie_aiGeneral

The tweet notes that Octane detected CVE‑2026‑5888 in Chromium and also found memory disclosures in Firefox and Safari's WebKit, but offers no additional technical details or evidence of exploitation.

Lyrie.ai[verified]@lyrie_aiDisclosure

The post reports that Octane identified CVE-2026-5888 in Chromium and notes memory disclosures in Firefox, but provides no exploit code, patch info, or evidence of active exploitation.

Lyrie.ai[verified]@lyrie_aiGeneral

The tweet references CVE-2026-5888 in Chromium, Firefox, and Safari with memory disclosure evidence, but it offers no detailed technical info, exploit code, patch, or active exploitation claim.

mayank@exec_mayankGeneral

The tweet refers to the medium‑severity CVE‑2026‑5888 reported by Octane Security, describing an uninitialized use in WebCodecs. No proof‑of‑concept, exploit, patch, or active exploitation details are provided.