How severe is CVE-2024-27834?

CVE-2024-27834 has a CVSS score of 5.5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2024-27834?

Affected package information for CVE-2024-27834 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2024-27834?

The records we use list no fixed release for CVE-2024-27834. Check the upstream advisory for a patched version, and apply the exposure-reduction steps below in the meantime.

How do I detect CVE-2024-27834 in my code and dependencies?

Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

How do I mitigate CVE-2024-27834 if there is no patch (or I can't update yet)?

Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Is CVE-2024-27834 actively exploited in the wild?

No public exploit code has been indexed for CVE-2024-27834 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2024-27834?

CVE-2024-27834 has an EPSS (Exploit Prediction Scoring System) score of 0.6%, placing it in the 49th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

Is CVE-2024-27834 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2024-27834 (Apple Multiple Products Improper Authentication Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-11-04. CISA required all US federal civilian agencies to remediate this vulnerability by 2026-11-18. The required action was: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2024-27834?

CVE-2024-27834 is classified as Improper Authentication (CWE-287). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2024-27834 published, and has it been updated?

CVE-2024-27834 was published on May 14, 2024 and was last updated on November 2, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🛡️

CISA KEV · ACTIVELY EXPLOITED

MEDIUM severity

CVE-2024-27834

MEDIUM

CVE-2024-27834 is a medium-severity (CVSS 5.5) Improper Authentication vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2026-11-04) — treat it as actively exploited and patch now. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Published

May 14, 2024

Updated

Nov 2, 2026

Affected

9 products

Patched

See advisory

Exploits

None indexed

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2026-11-04. Federal agencies were required to remediate by 2026-11-18.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2024-27834.

EPSS Exploitation Probability

via FIRST.org ↗

0.6%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Description

The issue was addressed with improved checks. This issue is fixed in Safari 17.5, iOS 16.7.8 and iPadOS 16.7.8, iOS 17.5 and iPadOS 17.5, macOS Sonoma 14.5, tvOS 17.5, watchOS 10.5. An attacker with arbitrary read and write capability may be able to bypass Pointer Authentication.

Affected Products

9 products · 10 configurations

ipadosapple

< 17.5

range

iphone osapple

< 17.5

range

macosapple

≥ 14.0 && < 14.5

range

Application

safariapple

< 17.5

range

tvosapple

< 17.5

range

watchosapple

< 10.5

range

Detection & mitigation playbook

Vulnerability

Detect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
The records we use list no fixed release for CVE-2024-27834. Check the upstream advisory for a patched version, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatImportant

Workaround published by Red Hat

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Source: Red Hat security advisory for CVE-2024-27834 (CC BY 4.0)

Product	Fixed in	Advisory
Red Hat Enterprise Linux 7 Extended Lifecycle Support	`webkitgtk4-0:2.48.3-2.el7_9`	RHSA-2025:10364
Red Hat Enterprise Linux 8	`webkit2gtk3-0:2.38.5-1.el8_8.5`	RHSA-2023:4202
Red Hat Enterprise Linux 8	`webkit2gtk3-0:2.46.3-1.el8_10`	RHSA-2024:9636
Red Hat Enterprise Linux 9	`webkit2gtk3-0:2.38.5-1.el9_2.3`	RHSA-2023:4201

UbuntuMEDIUM

USN-6788-1Ubuntu

Frequently Asked Questions

The issue was addressed with improved checks. This issue is fixed in iOS 17.5 and iPadOS 17.5, tvOS 17.5, Safari 17.5, watchOS 10.5, macOS Sonoma 14.5. An attacker with arbitrary read and write capability may be able to bypass Pointer Authentication.

O3 Security · Impact-Aware SCA

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CVE-2024-27834

Exploitation Status

Actively exploited in the wild

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Description

Affected Products

Detection & mitigation playbook

Detect

Remediation status

Mitigate without a patch

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2024-27834 in your dependencies?