CVE-2021-27291 · cross-distro fix matrix

CVE-2021-27291: In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.

Affects 3 Linux releases across 6 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-27291 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

mediawiki→ fixed in1:1.35.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mediawiki
```
pygments→ fixed in2.7.1+dfsg-2.1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y pygments
```

Debian bookworm

Source: Debian Security Tracker

mediawiki→ fixed in1:1.35.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mediawiki
```
pygments→ fixed in2.7.1+dfsg-2.1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y pygments
```

Debian trixie

Source: Debian Security Tracker

mediawiki→ fixed in1:1.35.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mediawiki
```
pygments→ fixed in2.7.1+dfsg-2.1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y pygments
```

Are YOU affected by CVE-2021-27291?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

CVE-2021-27291dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

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