How many CVEs have patched ParseHeader?

2 published CVEs changed ParseHeader in sumatrapdfreader/sumatrapdf, in 2 distinct patches totalling 7 changed lines, between 2026 and 2026.

What is the latest CVE that changed ParseHeader?

CVE-2026-107729 (SumatraPDF: Unsigned-to-signed hdrLen validation bypass in SumatraPDF MOBI parsing causes out-of-bounds read), published 2026-10-08, changed lines 562 to 564 of src/MobiDoc.cpp.

How does ParseHeader compare to the rest of sumatrapdfreader/sumatrapdf?

sumatrapdfreader/sumatrapdf has 16 CVEs with a located fix in total; 2 of them changed ParseHeader.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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sumatrapdfreader/sumatrapdf

Function

ParseHeader

Name: ParseHeader in sumatrapdfreader/sumatrapdf: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

src/MobiDoc.cpp

Last patched October 8, 2026

2

CVEs

That changed this function

2

Distinct patches

Backports counted once

7

Lines changed

Added plus removed

2026

Years

By CVE publication date

Overview

ParseHeader in sumatrapdfreader/sumatrapdf was changed by 2 published CVE fixes in 2026, in 2 distinct patches that added or removed 7 lines in total.

sumatrapdfreader/sumatrapdf has 16 CVEs with a located fix in total, so 13% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed ParseHeader, newest first, with the lines each fix touched.

SumatraPDF: Unsigned-to-signed hdrLen validation bypass in SumatraPDF MOBI parsing causes out-of-bounds read
CVE-2026-107729 · lines 562–564 · +3 −1
Medium · CVSS 5.5
EPSS 0.1%2026-10-08
SumatraPDF: Heap out-of-bounds read in MOBI header parser.
CVE-2026-26054 · lines 533–534 · +2 −1
Medium · CVSS 6.8
EPSS 0.1%2026-09-24

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Other functions in these files

Functions in the same file that CVE fixes also changed.

Other hotspots in the repository

Functions in sumatrapdfreader/sumatrapdf changed by the most CVE fixes.

LitParseHeader2 CVEs · src/LitDoc.cpp SendAIChatMessage1 CVEs · src/AIChatPanel.cpp BuildCmdLineTemp1 CVEs · src/CodexBuild.cpp QuoteCmdLineArgTemp1 CVEs · src/base/CmdLineArgsIter.cpp BuildClaudeTranslateCmdLineTemp1 CVEs · src/SelectionTranslate.cpp BuildGrokTranslateCmdLineTemp1 CVEs · src/SelectionTranslate.cpp

All patched functions in sumatrapdfreader/sumatrapdf

Frequently asked questions

Common questions about CVE fixes to ParseHeader.

How many CVEs have patched ParseHeader?: 2 published CVEs changed ParseHeader in sumatrapdfreader/sumatrapdf, in 2 distinct patches totalling 7 changed lines, between 2026 and 2026.
What is the latest CVE that changed ParseHeader?: CVE-2026-107729 (SumatraPDF: Unsigned-to-signed hdrLen validation bypass in SumatraPDF MOBI parsing causes out-of-bounds read), published 2026-10-08, changed lines 562 to 564 of src/MobiDoc.cpp.
How does ParseHeader compare to the rest of sumatrapdfreader/sumatrapdf?: sumatrapdfreader/sumatrapdf has 16 CVEs with a located fix in total; 2 of them changed ParseHeader.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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