CVE-2026-2772Disclosure(mozilla / firefox)

LOWCVSS 9.8 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch mozilla firefox systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Use-after-free in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

mozilla CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

Other references

Weakness type (CWE)

CWE-416

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

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

firefox
thunderbird

Threat summary

Patch or workaround signal is available
5 mentions across 4 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 5 signals
Disclosure: 4 classified signals
Peaked 3d ago at 2 mentions (2026-02-25); latest day: 1
5 total mentions across 4 days

Affected systems

Vendors

mozilla

Products

firefoxthunderbird

Deep dive

Activity timeline5 mentions / 4d

Signal classification2 categories

Disclosure

480.0%

Patch

120.0%

Referenced assets3 URLs

By indicator

Classification over time

Date	Total	Labels

2026-02-25	2	Disclosure2
2026-02-28	1	Disclosure1
2026-03-01	1	Disclosure1
2026-04-16	1	Patch1

Full discourse5 posts

Giuseppe Paternicola@giuseppe_1337178d
Patch
🚨 CRITICAL: CVE-2026-2772 (CVSS 9.8) - Use-after-free in Firefox/Thunderbird Audio/Video Playback. Network exploitable, no user interaction required. Patch immediately to Firefox 148, ESR 115.33/140.8, Thunderbird 148/140.8. #CVE #PatchNow https://t.co/wJhkxzhdhN
Post summary
The tweet announces a critical use-after-free CVE‑2026‑2772 affecting Firefox/Thunderbird, urges users to patch immediately, but does not provide a PoC, exploitation tool, or claim active exploitation.
0000041
25 followersView on X
CRAC Learning - Tech@cracbot224d
Disclosure
CVE-2026-2772 (CVSS:9.8, CRITICAL) is Modified. Use-after-free in the Audio/Video: Playback component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, F..https://nvd.nist.gov/vuln/detail/CVE-2026-2772 #cybersecurityawareness #cybersecurity #CVE #infosec #hacker #nvd #mitre
Post summary
The text announces CVE-2026-2772, a critical use‑after‑free vulnerability in Firefox’s audio/video playback component, with a CVSS score of 9.8, but provides no PoC, exploit, or patch details.
0000026
173 followersView on X
CRAC Learning - Tech@cracbot225d
Disclosure
CVE-2026-2772 (CVSS:9.8, CRITICAL) is Modified. Use-after-free in the Audio/Video: Playback component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, F..https://nvd.nist.gov/vuln/detail/CVE-2026-2772 #cybersecurityawareness #cybersecurity #CVE #infosec #hacker #nvd #mitre
Post summary
The post announces CVE-2026-2772, a critical use‑after‑free flaw in Firefox’s audio/video playback component, providing severity and affected version details but no PoC, exploit, or patch information.
0000045
173 followersView on X
Infoflowcloud@infoflowcloud227d
Disclosure
🚨*CVE* CVE-2026-2772 Use-after-free in the Audio/Video: Playback component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8. https://www.cve.org/CVERecord?id=CVE-2026-2772 ----- Traducción: CVE-2026-2772 Uso después de liberar en el c… http://infoflow.cloud`
Post summary
The post announces CVE-2026-2772, a use‑after‑free flaw in Firefox’s audio/video playback component affecting specific versions, without mentioning PoC, exploit, or patch details.
0000042
54 followersView on X
CVE@CVEnew227d
Disclosure
CVE-2026-2772 Use-after-free in the Audio/Video: Playback component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8. https://www.cve.org/CVERecord?id=CVE-2026-2772
Post summary
The text announces a use‑after‑free vulnerability in Firefox’s audio/video playback component, affecting specific versions, without mentioning PoC, exploit code, or patch details.
00000246
56.6K 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
App	mozilla	firefox	-	-	-
App	mozilla	firefox	-	-	-
App	mozilla	thunderbird	-	-	-
App	mozilla	thunderbird	-	-	-

Explore more

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What researchers are saying

CVE-2026-2772

Giuseppe Paternicola[verified]@giuseppe_1337Patch

The tweet announces a critical use-after-free CVE‑2026‑2772 affecting Firefox/Thunderbird, urges users to patch immediately, but does not provide a PoC, exploitation tool, or claim active exploitation.

CRAC Learning - Tech@cracbotDisclosure

The text announces CVE-2026-2772, a critical use‑after‑free vulnerability in Firefox’s audio/video playback component, with a CVSS score of 9.8, but provides no PoC, exploit, or patch details.

CRAC Learning - Tech@cracbotDisclosure

The post announces CVE-2026-2772, a critical use‑after‑free flaw in Firefox’s audio/video playback component, providing severity and affected version details but no PoC, exploit, or patch information.

Infoflowcloud@infoflowcloudDisclosure

The post announces CVE-2026-2772, a use‑after‑free flaw in Firefox’s audio/video playback component affecting specific versions, without mentioning PoC, exploit, or patch details.

CVE@CVEnewDisclosure

The text announces a use‑after‑free vulnerability in Firefox’s audio/video playback component, affecting specific versions, without mentioning PoC, exploit code, or patch details.