CVE-2021-38614: Polipo through 1.1.1, when NDEBUG is used, allows a heap-based buffer overflow during parsing of a Range heade

Q: How do I fix CVE-2021-38614?

polipo: upgrade to newer than 1.1.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-38614 being exploited?

CVE-2021-38614 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-38614 affect?

CVE-2021-38614 affects polipo. Severity is high (CVSS 7.5). Polipo through 1.1.1, when NDEBUG is used, allows a heap-based buffer overflow during parsing of a Range header. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Q: How urgent is CVE-2021-38614?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-38614 is a high-severity flaw (CVSS 7.5) affecting polipo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Polipo through 1.1.1, when NDEBUG is used, allows a heap-based buffer overflow during parsing of a Range header. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-787
Published	2021-08-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: polipo project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-08-12 23:15 UTCPublished CVE record published
2026-06-17 04:02 UTCUpdated Record last modified

polipo project polipo UPGRADE

Affected: <= 1.1.1

Fixed in: newer than 1.1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy polipo || rpm -q polipo || polipo --version

2. UPGRADE to newer than 1.1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade polipo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade polipo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-38614?

polipo: upgrade to newer than 1.1.1. Exact commands for each OS are on this page.

Is CVE-2021-38614 being exploited?

CVE-2021-38614 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-38614 affect?

CVE-2021-38614 affects polipo. Severity is high (CVSS 7.5). Polipo through 1.1.1, when NDEBUG is used, allows a heap-based buffer overflow during parsing of a Range header. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

How urgent is CVE-2021-38614?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-36420 HIGH 7.5 UPGRADE Polipo through 1.1.1, when NDEBUG is omitted, allows denial of service via a reachable assertion during parsin

References

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