How severe is CVE-2024-49769?

CVE-2024-49769 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-49769 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-49769?

CVE-2024-49769 affects Agendaless Waitress. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-49769?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-49769 have an EU (EUVD) identifier?

Yes. CVE-2024-49769 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0188.

When was CVE-2024-49769 published?

CVE-2024-49769 was published on 2024-10-29 and last updated on 2026-06-17.

CVE-2024-49769

CVE-2024-49769 is a high-severity vulnerability in Agendaless Waitress with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-772.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-0188
Weakness: CWE-772
Affected product: Agendaless Waitress
Published: 2024-10-29
Last modified: 2026-06-17

Description

Waitress is a Web Server Gateway Interface server for Python 2 and 3. When a remote client closes the connection before waitress has had the opportunity to call getpeername() waitress won't correctly clean up the connection leading to the main thread attempting to write to a socket that no longer exists, but not removing it from the list of sockets to attempt to process. This leads to a busy-loop calling the write function. A remote attacker could run waitress out of available sockets with very little resources required. Waitress 3.0.1 contains fixes that remove the race condition.

Frequently asked questions

What is CVE-2024-49769?: Waitress is a Web Server Gateway Interface server for Python 2 and 3. When a remote client closes the connection before waitress has had the opportunity to call getpeername() waitress won't correctly clean up the connection leading to the main thread attempting to write to a socket that no longer exists, but not removing it from the list of sockets to attempt to process. This leads to a busy-loop calling the write function. A remote attacker could run waitress out of available sockets with very little resources required. Waitress 3.0.1 contains fixes that remove the race condition.
How severe is CVE-2024-49769?: CVE-2024-49769 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-49769 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-49769?: CVE-2024-49769 affects Agendaless Waitress. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-49769?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-49769 have an EU (EUVD) identifier?: Yes. CVE-2024-49769 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0188.
When was CVE-2024-49769 published?: CVE-2024-49769 was published on 2024-10-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:agendaless:waitress:*:*:*:*:*:*:*:*

More vulnerabilities in Agendaless Waitress

CVE-2024-49768 — Critical (CVSS 9.1): Waitress is a Web Server Gateway Interface server for Python 2 and 3. A remote client may send a request that is…
CVE-2022-24761 — High (CVSS 7.5): Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior…
CVE-2019-16792 — High (CVSS 7.1): Waitress through version 1.3.1 allows request smuggling by sending the Content-Length header twice. Waitress would…
CVE-2019-16789 — High (CVSS 7.1): In Waitress through version 1.4.0, if a proxy server is used in front of waitress, an invalid request may be sent by an…
CVE-2019-16786 — High (CVSS 7.1): Waitress through version 1.3.1 would parse the Transfer-Encoding header and only look for a single string value, if…
CVE-2019-16785 — High (CVSS 7.1): Waitress through version 1.3.1 implemented a "MAY" part of the RFC7230 which states: "Although the line terminator for…

All CVEs affecting Agendaless Waitress →

Other CWE-772 vulnerabilities

CVE-2020-12134 — Critical (CVSS 9.8): Nanometrics Centaur through 4.3.23 and TitanSMA through 4.2.20 mishandle access control for the syslog log.
CVE-2017-15032 — Critical (CVSS 9.8): ImageMagick version 7.0.7-2 contains a memory leak in ReadYCBCRImage in coders/ycbcr.c.
CVE-2017-14138 — Critical (CVSS 9.8): ImageMagick 7.0.6-5 has a memory leak vulnerability in ReadWEBPImage in coders/webp.c because memory is not freed in…
CVE-2017-11641 — Critical (CVSS 9.8): GraphicsMagick 1.3.26 has a Memory Leak in the PersistCache function in magick/pixel_cache.c during writing of Magick…
CVE-2020-14339 — High (CVSS 8.8): A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This…
CVE-2018-19760 — High (CVSS 8.8): cfg_init in confuse.c in libConfuse 3.2.2 has a memory leak.

Browse all CWE-772 vulnerabilities →