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CVE-2020-36829

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that...

7.5 HighFix available

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.51%Up 0.5 points since Apr 8, 2024
90%50%10%1%

What each source reports

CVE List Score used 7.5

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.

Record
CVE-2020-36829
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
EUVDEUVD-2020-24270 7.5

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.

Record
EUVD-2020-24270
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-jx7f-v5r5-55j4 7.5

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that...

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.

Record
GHSA-jx7f-v5r5-55j4
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
NVD 7.5

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.

Record
CVE-2020-36829
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSV 7.5

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.

Record
CVE-2020-36829
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2020-36829 7.5

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.

Record
DEBIAN-CVE-2020-36829
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
Show 6 moreShow less
OSVOESA-2024-1517 7.5

perl-Mojolicious security update

Back in the early days of the web there was this wonderful Perl library called CGI, many people only learned Perl because of it. It was simple enough to get started without knowing much about the language and powerful enough to keep you going, learning by doing was much fun. While most of the techniques used are outdated now, the idea behind it is not. Mojolicious is a new attempt at implementing this idea using state of the art technology.

Security Fix(es):

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.(CVE-2020-36829)

The Mojolicious module before 9.11 for Perl has a bug in format detection that can potentially be exploited for denial of service.(CVE-2021-47208)

Record
OESA-2024-1517
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVOESA-2024-1518 7.5

perl-Mojolicious security update

Back in the early days of the web there was this wonderful Perl library called CGI, many people only learned Perl because of it. It was simple enough to get started without knowing much about the language and powerful enough to keep you going, learning by doing was much fun. While most of the techniques used are outdated now, the idea behind it is not. Mojolicious is a new attempt at implementing this idea using state of the art technology.

Security Fix(es):

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.(CVE-2020-36829)

The Mojolicious module before 9.11 for Perl has a bug in format detection that can potentially be exploited for denial of service.(CVE-2021-47208)

Record
OESA-2024-1518
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVOESA-2024-1519 7.5

perl-Mojolicious security update

Back in the early days of the web there was this wonderful Perl library called CGI, many people only learned Perl because of it. It was simple enough to get started without knowing much about the language and powerful enough to keep you going, learning by doing was much fun. While most of the techniques used are outdated now, the idea behind it is not. Mojolicious is a new attempt at implementing this idea using state of the art technology.

Security Fix(es):

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.(CVE-2020-36829)

The Mojolicious module before 9.11 for Perl has a bug in format detection that can potentially be exploited for denial of service.(CVE-2021-47208)

Record
OESA-2024-1519
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2020-36829 7.5

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.

Record
UBUNTU-CVE-2020-36829
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVAZL-43936 No score

CVE-2020-36829 affecting package perl-Mojolicious 8.57-3

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.

Record
AZL-43936
Updated
2026-11-02
OSVAZL-45018 No score

CVE-2020-36829 affecting package perl-Mojolicious 8.57-3

The Mojolicious module before 8.65 for Perl is vulnerable to secure_compare timing attacks that allow an attacker to guess the length of a secret string. Only versions after 1.74 are affected.

Record
AZL-45018
Updated
2026-11-05

Affected products

Affected packages

Affected packages
PackageAffectedFixed
perl-Mojolicious
Azure Linux:2
through 8.57-3 None known
perl-Mojolicious
Azure Linux:3
through 8.57-3 None known
libmojolicious-perl
Debian:12
before 8.65+dfsg-1
8.65+dfsg-1
libmojolicious-perl
Debian:13
before 8.65+dfsg-1
8.65+dfsg-1
libmojolicious-perl
Debian:14
before 8.65+dfsg-1
8.65+dfsg-1
libmojolicious-perl
Debian:10
before 8.12+dfsg-1.1~deb10u1, plus listed versions
8.12+dfsg-1
8.12+dfsg-1.1~deb10u1
perl-Mojolicious
openEuler:20.03-LTS-SP1
From an advisory covering 2 CVEs
before 9.26-1.oe1
9.26-1.oe1
perl-Mojolicious
openEuler:20.03-LTS-SP4
From an advisory covering 2 CVEs
before 9.26-1.oe2003sp4
9.26-1.oe2003sp4
perl-Mojolicious
openEuler:22.03-LTS
From an advisory covering 2 CVEs
before 9.26-1.oe2203
9.26-1.oe2203
libmojolicious-perl
Ubuntu:16.04:LTS
All versions, plus listed versions
6.15+dfsg-16.15+dfsg-1ubuntu1
None known
libmojolicious-perl
Ubuntu:18.04:LTS
All versions, plus listed versions
7.39+dfsg-1ubuntu17.43+dfsg-1ubuntu17.57+dfsg-1ubuntu17.59+dfsg-1ubuntu1
None known
libmojolicious-perl
Ubuntu:20.04:LTS
All versions, plus listed versions
8.22+dfsg-18.23+dfsg-18.26+dfsg-18.27+dfsg-18.32+dfsg-18.33+dfsg-1
None known

History

History
RecordedChangedSources
affected
factsOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-36829 is a high vulnerability (CVSS 7.5) in Mojolicious, published April 7, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.51%, the 43rd percentile. Fixed in libmojolicious-perl 8.65+dfsg-1.

References

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