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TI-2025-19630 Aliases CVE-2025-26696GHSA-w56w-w5xr-q52m

Crafted email message incorrectly shown as being encrypted

Priority LOW 31CWE-290Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · Low
Fix status
Partial Red Hat: 13 fixed, 4 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-290.

Summary

Certain crafted MIME email messages that claimed to contain an encrypted OpenPGP message, which instead contained an OpenPGP signed message, were wrongly shown as being encrypted. This vulnerability was fixed in Thunderbird 136 and Thunderbird 128.8.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00356 29th percentileScored 2026-11-07
Fix Partial Thunderbird (Mozilla): 128.8, 136Red Hat: 9 advisoriesRed Hat: 13 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbird—128.8, 136Patch availableCNA
  • Thunderbird VendorMozilla Affected — Fixed in 128.8, 136 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 128.8.0; 129.0 to before 136.0VulnerableMozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 128.8.0; 129.0 to before 136.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 128.8, 136

Red Hat 9 advisories

  • RHSA-2025:3036 Released 2025-03-19 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) thunderbird-128.8.0-2.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) thunderbird-128.8.0-2.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) thunderbird-128.8.0-2.el8_6
  • RHSA-2025:3013 Released 2025-03-18 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) thunderbird-128.8.0-2.el9_0
  • RHSA-2025:3009 Released 2025-03-18 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-128.8.0-2.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird-128.8.0-2.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird-128.8.0-2.el8_4
Show 6 more Red Hat advisories
  • RHSA-2025:2958 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) thunderbird-128.8.0-2.el8_8
  • RHSA-2025:2959 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) thunderbird-128.8.0-2.el9_2
  • RHSA-2025:2960 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-128.8.0-2.el8_2
  • RHSA-2025:2957 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) thunderbird-128.8.0-2.el9_4
  • RHSA-2025:2900 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-128.8.0-2.el8_10
  • RHSA-2025:2899 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-128.8.0-2.el9_5

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:2900
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:2899
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2025:2960
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2025:3009
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2025:3036
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2025:3009
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2025:3036
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:3013
Red Hat Enterprise Linux AppStream EUS (v.8.8)Fixed RHSA-2025:2958
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2025:2959
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:2957
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2025:3009
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2025:3036

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-26696
  2. 2026-10-03 Alias added: GHSA-w56w-w5xr-q52m

References

Advisory 2

Other 1

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 2067 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences