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TI-2023-27692 Aliases CVE-2023-50762GHSA-63rr-fhmr-42fq

When processing a PGP/MIME payload that contains digitally signed text, the first…

Priority LOW 21Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Partial Red Hat: 15 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

When processing a PGP/MIME payload that contains digitally signed text, the first paragraph of the text was never shown to the user. This is because the text was interpreted as a MIME message and the first paragraph was always treated as an email header section. A digitally signed text from a different context, such as a signed GIT commit, could be used to spoof an email message. This vulnerability affects Thunderbird < 115.6.

Why it matters now

EPSS 0.00633 50th percentileScored 2026-11-07
Fix Partial Thunderbird (Mozilla): 115.6Red Hat: 9 advisoriesRed Hat: 15 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 115.6115.6Patch availableCNA
  • Thunderbird VendorMozilla Affected before 115.6 Fixed in 115.6 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 115.6VulnerableMozilla
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*12.0VulnerableDebian
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 115.6 Vulnerable ·Mozilla
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 115.6

Red Hat 9 advisories

  • RHSA-2024:0027 Released 2024-01-02 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-115.6.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-115.6.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-115.6.0-1.el7_9
  • RHSA-2024:0029 Released 2024-01-02 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) thunderbird-115.6.0-1.el9_2
  • RHSA-2024:0030 Released 2024-01-02 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-115.6.0-1.el8_2
    • Red Hat Enterprise Linux AppStream E4S (v. 8.2) thunderbird-115.6.0-1.el8_2
    • Red Hat Enterprise Linux AppStream TUS (v. 8.2) thunderbird-115.6.0-1.el8_2
Show 6 more Red Hat advisories
  • RHSA-2024:0028 Released 2024-01-02 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-115.6.0-1.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird-115.6.0-1.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird-115.6.0-1.el8_4
  • RHSA-2024:0003 Released 2024-01-02 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-115.6.0-1.el8_9
  • RHSA-2024:0005 Released 2024-01-02 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) thunderbird-115.6.0-1.el8_6
  • RHSA-2024:0004 Released 2024-01-02 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) thunderbird-115.6.0-1.el8_8
  • RHSA-2024:0002 Released 2024-01-02 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) thunderbird-115.6.0-1.el9_0
  • RHSA-2024:0001 Released 2024-01-02 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-115.6.0-1.el9_3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Mozilla Thunderbird 115.6

    11 records Highest priority Priority MEDIUM 7 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2023-06261 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 57
    • TI-2023-06263 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2023-06267 Use after free in Mozilla Firefox ESRPriority MEDIUM 42
    Show all 11 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2024:0003
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:0001
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2024:0030
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2024:0028
Red Hat Enterprise Linux AppStream E4S (v. 8.2)Fixed RHSA-2024:0030
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2024:0028
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2024:0005
Red Hat Enterprise Linux AppStream EUS (v.8.8)Fixed RHSA-2024:0004
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2024:0002
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:0029
Red Hat Enterprise Linux AppStream TUS (v. 8.2)Fixed RHSA-2024:0030
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2024:0028
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2024:0027
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2024:0027
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2024:0027

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-50762
  2. 2026-10-03 Alias added: GHSA-63rr-fhmr-42fq
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Advisory 2

Other 2

  • 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