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Developers don't understand CORS (2019)

The recent Zoom vulnerability is just one of many examples which show us that many developers do not understand how CORS works

72 points

31 comments

discussion source

Epoll vs. io_uring in Linux

104 points

29 comments

discussion source

When I reject AI code even if it works

AI can make implementation cheap while making review and judgment more expensive.

111 points

67 comments

discussion source

DOS Game "F-15 Strike Eagle II" reversing project needs DOS test pilots

(This post is part of a series on the subject of my hobby project, which is recreating the C source code for the 1989 game F-15 Strike Eagle II by reverse engineering the original binaries.)

226 points

60 comments

discussion source

UHF X11: X11 Built for VisionOS and Apple Vision Pro

UHF X11 is a native X11 server for Apple Vision Pro. Run classic Unix and workstation software in spatial windows on visionOS.

186 points

32 comments

discussion source

Building Reliable Agentic AI Systems

7 points

0 comments

discussion source

Show HN: TownSquare, a tiny presence layer for websites

TownSquare adds a small shared place to your website where visitors can see each other, walk around, and chat.

125 points

62 comments

discussion source

Guide to the TD4 4-bit DIY CPU

I bought a cute little 4 bit cpu kit from Aliexpress called the TD4. It has 2 registers, some LEDs, and 16 bytes of program ROM. Quite limited but still very cool and teaches a lot of principles of computer architecture.

14 points

0 comments

discussion source

Your brain was never designed for this much bad news

Humans evolved to pay close attention to danger, but today that instinct is being overwhelmed by an endless supply of bad news from around the world. Researchers say the answer isn’t to stop following current events—it’s to build healthier habits around how, when, and where we get our news.

44 points

16 comments

discussion source

NOLA 'Nacular: One man's crusade to preserve New Orleans's vernacular signage

Anthony DelRosario’s crusade to preserve New Orleans’s vernacular signage,Anthony DelRosario’s crusade to preserve New Orleans’s vernacular signage

31 points

2 comments

discussion source

Zigzag Decoding with AVX-512

8 points

0 comments

discussion source

Renting a sewing machine from the library

Finland's libraries are increasingly being valued not by how many books they lend, but how they help societies function.

171 points

89 comments

discussion source

Semiconductor Lifeline Keeps Fighter Jets in the Air

Phoenix Semiconductor keeps fighter jets and critical systems alive by repackaging legacy semiconductor parts into plug-and-play replacements.

58 points

18 comments

discussion source

SMPTE Makes Its Standards Freely Accessible

WHITE PLAINS, N.Y. — June 17, 2026 — SMPTE®, the home of media professionals, technologists and engineers, has announced that its entire Standards catalog is now freely available to the global media technology community.

242 points

71 comments

discussion source

Loupe – A iOS app that raises awareness about what native apps can see

A privacy-focused iOS app that raises awareness about what native apps can see - mysk-research/loupe

152 points

40 comments

discussion source

15-minute at-home Lyme disease tick test

LymeAlert seeks to help people avoid the cost and the wait of going to the emergency room after being bitten by a tick.

74 points

23 comments

discussion source

Slow breathing modulates brain function and risk behavior

117 points

25 comments

discussion source

Project Fetch: Phase Two

We report results from our latest test of whether Claude can help Anthropic employees perform sophisticated robotics tasks. We found that Claude Opus 4.7, operating without human assistance, was about 20 times faster than the fastest human team at all tasks completed by participants less than a year ago.

50 points

18 comments

discussion source

Whole cross-sectional human ultrasound tomography

Ultrasonography is a vital component of modern clinical care, with handheld probes routinely used for diagnostic imaging and procedural guidance. However, handheld ultrasound imaging is limited by factors such as the partial cross-sectional field of view, operator dependency, contact-induced distortion and lack of transmission contrast. Here we demonstrate a new system that enables whole cross-sectional ultrasound tomography of humans in both reflection and transmission modes. We generate two-dimensional images of the entire in vivo human cross-section in the abdomen and thighs with uniform in-plane resolution using a custom 512-element circular ultrasound receiver array and a rotating transmitter. Sequential scans with our system show stro

51 points

9 comments

discussion source

Unauthorized alert sent to cell phones across Brazil

An unauthorized alert bearing a mysterious message that was sent to cell phones in several states across Brazil on Saturday morning is suspected to be the work of hackers, the Brazilian government said.

109 points

82 comments

discussion source

On this day

A hot air balloon catches fire mid-flight and crashes in Praia Grande, Santa Catarina, Brazil, killing 8 of the 21 on board.

2025

Top Stories from Hacker News

Developers don't understand CORS (2019)

Epoll vs. io_uring in Linux

When I reject AI code even if it works

DOS Game "F-15 Strike Eagle II" reversing project needs DOS test pilots

UHF X11: X11 Built for VisionOS and Apple Vision Pro

Building Reliable Agentic AI Systems

Show HN: TownSquare, a tiny presence layer for websites

Guide to the TD4 4-bit DIY CPU

Your brain was never designed for this much bad news

NOLA 'Nacular: One man's crusade to preserve New Orleans's vernacular signage

Zigzag Decoding with AVX-512

Renting a sewing machine from the library

Semiconductor Lifeline Keeps Fighter Jets in the Air

SMPTE Makes Its Standards Freely Accessible

Loupe – A iOS app that raises awareness about what native apps can see

15-minute at-home Lyme disease tick test

Slow breathing modulates brain function and risk behavior

Project Fetch: Phase Two

Whole cross-sectional human ultrasound tomography

Unauthorized alert sent to cell phones across Brazil

On this day

A hot air balloon catches fire mid-flight and crashes in Praia Grande, Santa Catarina, Brazil, killing 8 of the 21 on board.

A boat carrying more than 200 migrants capsizes in the Indian Ocean between the Indonesian island of Java and Christmas Island, killing 17 people and leaving 70 others missing.

An Indonesian Air Force Fokker F27 Friendship crashes near Halim Perdanakusuma International Airport, killing 11.

Greenland assumes self-rule.

Pluto's newly discovered moons are officially named Nix and Hydra.

A Yeti Airlines de Havilland Canada DHC-6 Twin Otter crashes at Jumla Airport in Nepal, killing nine people.

Edgar Ray Killen, who had previously been unsuccessfully tried for the murders of James Chaney, Andrew Goodman, and Mickey Schwerner, is convicted of manslaughter 41 years afterwards (the case had been reopened in 2004).

SpaceShipOne becomes the first privately funded spaceplane to achieve spaceflight.

A federal grand jury in Alexandria, Virginia, indicts 13 Saudis and a Lebanese in the 1996 bombing of the Khobar Towers in Saudi Arabia that killed 19 American servicemen.

Section 28 (of the Local Government Act 1988), outlawing the 'promotion' of homosexuality in the United Kingdom, is repealed in Scotland with a 99 to 17 vote.

Space Shuttle Endeavour is launched on STS-57 to retrieve the European Retrievable Carrier (EURECA) satellite. It is also the first shuttle mission to carry the Spacehab module.

The U.S. Supreme Court rules in Texas v. Johnson, 491 U.S. 397, that American flag-burning is a form of political protest protected by the First Amendment.

Braathens SAFE Flight 139 is hijacked on approach to Oslo Airport, Fornebu. Special forces arrest the hijacker and there are no fatalities.

John Hinckley is found not guilty by reason of insanity for the attempted assassination of U.S. President Ronald Reagan.

The original production of Tim Rice and Andrew Lloyd Webber's musical, Evita, based on the life of Eva Perón, opens at the Prince Edward Theatre, London.

The Primer Congreso del Hombre Andino is inaugurated in Arica, Chile.

In its decision in Miller v. California, 413 U.S. 15, the Supreme Court of the United States establishes the Miller test for determining whether something is obscene and not protected speech under the U.S. constitution.

Penn Central declares Section 77 bankruptcy in what was the largest U.S. corporate bankruptcy to date.

Three civil rights workers, Andrew Goodman, James Chaney and Michael Schwerner, are murdered in Neshoba County, Mississippi, United States, by members of the Ku Klux Klan.

Cardinal Giovanni Battista Montini is elected as Pope Paul VI.

Ellen Fairclough is sworn in as Canada's first female Cabinet Minister.

The Philippine School of Commerce, through a republic act, is converted to Philippine College of Commerce, later to be the Polytechnic University of the Philippines.

World War II: The Battle of Okinawa ends when the organized resistance of Imperial Japanese Army forces collapses in the Mabuni area on the southern tip of the main island.

World War II: Tobruk falls to Italian and German forces; 33,000 Allied troops are taken prisoner.

World War II: A Japanese submarine surfaces near the Columbia River in Oregon, firing 17 shells at Fort Stevens in one of only a handful of attacks by Japan against the United States mainland.

Having defeated forces of Vichy France, Allied forces capture Damascus.

World War II: Italy begins an unsuccessful invasion of France.

One-year conscription comes into force in France.

An agreement brokered by U.S. Ambassador Dwight Whitney Morrow ends the Cristero War in Mexico.

The Irish village of Knockcroghery was burned by British forces.

The Royal Canadian Mounted Police fire a volley into a crowd of unemployed war veterans, killing two, during the Winnipeg general strike.

Admiral Ludwig von Reuter scuttles the German fleet at Scapa Flow, Orkney. The nine sailors killed are the last casualties of World War I.

The U.S. Supreme Court hands down its decision in Guinn v. United States 238 US 347 1915, striking down Oklahoma grandfather clause legislation which had the effect of denying the right to vote to blacks.

Boxer Rebellion: China formally declares war on the United States, Britain, Germany, France and Japan, as an edict issued from the Empress Dowager Cixi.

The United States captures Guam from Spain. The few warning shots fired by the U.S. naval vessels are misinterpreted as salutes by the Spanish garrison, which was unaware that the two nations were at war.

American Civil War: The Battle of Jerusalem Plank Road begins.

In the Wallachian Revolution, Ion Heliade Rădulescu and Christian Tell issue the Proclamation of Islaz and create a new republican government.

Maniots defeat Egyptians under Ibrahim Pasha in the Battle of Vergas.

Greek War of Independence: Egyptian forces capture Psara in the Aegean Sea.

Peninsular War: Wellington defeats Joseph Bonaparte at the Battle of Vitoria.

Irish Rebellion of 1798: The British Army defeats Irish rebels at the Battle of Vinegar Hill.

King Louis XVI and his immediate family begin the Flight to Varennes during the French Revolution.

New Hampshire becomes the ninth state to ratify the Constitution of the United States.

James Otis Jr. offends the King and Parliament in a speech to the Massachusetts General Court.

Halifax, Nova Scotia, is founded.

In Montreal, New France, a slave known by the French name of Marie-Joseph Angélique is put to death, having been convicted of setting the fire that destroyed much of the city.

Execution of 27 Czech noblemen on the Old Town Square in Prague as a consequence of the Battle of White Mountain.

Sengoku period: Oda Nobunaga, the most powerful of the Japanese daimyōs, is forced to commit suicide by his own general Akechi Mitsuhide.

French forces are driven out of northern Italy by Spain at the Battle of Landriano during the War of the League of Cognac.

Külüg Khan is enthroned as Khagan of the Mongols and Wuzong of the Yuan.

Caliph al-Muhtadi is killed by rebellious troops and is succeeded by his cousin Al-Mu'tamid.

A Byzantine expeditionary fleet under Belisarios sails from Constantinople to attack the Vandals in Africa, via Greece and Sicily.

A Carthaginian force under Hannibal ambushes and defeats a Roman army commanded by Gaius Flaminius in the battle of lake Trasimene during the Second Punic War.

On this day

A hot air balloon catches fire mid-flight and crashes in Praia Grande, Santa Catarina, Brazil, killing 8 of the 21 on board.

A boat carrying more than 200 migrants capsizes in the Indian Ocean between the Indonesian island of Java and Christmas Island, killing 17 people and leaving 70 others missing.

An Indonesian Air Force Fokker F27 Friendship crashes near Halim Perdanakusuma International Airport, killing 11.

Greenland assumes self-rule.