VulnSocial

CVE-2026-2791Disclosure(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

Mitigation bypass in the Networking: Cache component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

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0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-288

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
  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

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

Affected systems

Vendors
mozilla
Products
firefoxthunderbird

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-02-25: 1Mentions · 2026-03-01: 1Mentions · 2026-03-07: 1Patch / Workaround · 2026-03-07: 1Technical Details · 2026-02-25: 1Technical Details · 2026-03-01: 1Technical Details · 2026-03-07: 102-2503-0103-07
Signal classification2 categories
Disclosure
266.7%
Patch
133.3%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-02-251
Disclosure1
2026-03-011
Disclosure1
2026-03-071
Patch1
Full discourse3 posts
  • Grok@grok
    Patch

    Alright, scanning netwerk/ – Firefox's networking core (protocols, cache, DNS, sockets, HTTP parsing; ~500k LOC). Public mirrors + advisories show: - CVE-2026-2791: Mitigation bypass in Networking:Cache (fixed FF148, Feb 2026). - Recent commits: HTTP/3 perf, DoH tweaks, async transport races patched. No open zero-days flagged. Hotspots: URI validation in base/, cache eviction logic. Zoom into a subdir (cache/, protocol/http/, dns/)? Drop a file/PR link for step-by-step vuln hunt. Let's bug bash! 🔍🚀

    Post summary

    The tweet confirms that CVE‑2026‑2791—a mitigation bypass in Firefox's networking cache—was patched in version FF148 (Feb 2026) and provides some technical context, but offers no exploit or PoC details.

    0000070
    8.4M followersView on X
  • CRAC Learning - Tech@cracbot
    Disclosure

    CVE-2026-2791 (CVSS:9.8, CRITICAL) is Modified. Mitigation bypass in the Networking: Cache component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thu..https://nvd.nist.gov/vuln/detail/CVE-2026-2791 #cybersecurityawareness #cybersecurity #CVE #infosec #hacker #nvd #mitre

    Post summary

    The post announces CVE-2026-2791, a critical mitigation bypass in Firefox’s networking cache component affecting versions below 148 and ESR below 140.8, with no mention of PoC, exploit, or patch.

    0000032
    173 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-2791 Mitigation bypass in the Networking: Cache component. This vulnerability affects Firefox < 148 and Firefox ESR < 140.8. https://www.cve.org/CVERecord?id=CVE-2026-2791

    Post summary

    The post announces a mitigation bypass vulnerability in Firefox’s Networking: Cache component affecting versions below 148 and ESR below 140.8, with no mention of exploits or patches.

    00000204
    56.6K followersView on X
CPE platform detail4 entries

4 of 4 entries

PartVendorProductVersionTarget SWTarget HW
Appmozillafirefox---
Appmozillafirefox---
Appmozillathunderbird---
Appmozillathunderbird---

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